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Abstract 2018

Rivista Mineralogica Italiana > Abstract Articoli
Abstract ITALIAN MINERALOGICAL MAGAZINE
nr. 1-2018
MINERALS OF LIGURIAN RODINGITES

This work provides an updated and compre- hensive  picture,  though  not  exhaustive,  of some significant mineralogical findings in the Alpine and Apennine rodingites of Liguria dur- ing the last fifty years. In addition, to a renewed photographic documentation of “classic” samples of garnet, vesuvianite, titanite, etc., this article presents a systematic description of the mineralogical species found in Ligurian rodin- gites so far.
The main localities that have provided samples of aesthetic value or scientific interest are also described, from the most famous to the lesser known. The historical and modern literature on Ligurian rodingites, both geological and mineralogical, is finally revisited to high- light the knowledge acquired so far and the questions still open on the genesis of the mineralogical associations of these rocks.
Abstract ITALIAN MINERALOGICAL MAGAZINE
nr. 2-2018
TINGHERLA MINE – UPDATE OF A CLASSIC MINERALOGICAL LOCALITY FROM TRENTINO

Tingherla mine, located on the east side of Pergine Valsugana, on the left of the Fersina Val- ley (or Mòcheni Valley), belongs to a series of mines located in the “Alta Valsugana - Valle del Fersina” miningi district. These mines exploited hydrothermal veins whose origin is likely related to the occurrence of an early Permian intrusive magmatism. Tingherla mine is well known for the beautiful samples of fluorite, quartz, malachite and auricalcite found mainly during the exploita- tion of the mine (1958-1962). Today, it represents a source of nice specimens of secondary Cu-Pb-Zn minerals. The aim of this paper is to summarize the historical and mining knowledge on this mine besides being a rich update of the mineral- ogical species here found.
Among more than 60 described minerals stand out some interesting news like annabergite, arthurite, chalcophanite, delafossite, dundasite, lavendulan, namuwite, ramsbeckite, schulenbergite, woodruffite and zavaritskite, in addition to a set of sulfosalts still unidentified.
PENTLANDITE - THE CRYSTALIZED SAMPLES OF NIBBIAIA, LIVORNO

Prismatic to acicular crystals of pentlandite, closely associated with violarite, up to 0,5 mm in length, deeply striated and silvery-grey in color, have been found in quartz-calcite veinlets embedded in a chlorite rich ophiolitic breccia near the small town of Nibbiaia, Lenghorn, Tuscany. To the authors’ knowledge, this could be one of the most interesting finding of well crystallized pentlandite world-wide
BREISLAKITE (VONSENITE) - HISTORY OF A NEW MINERAL NEVER APPROVED

The name “breislakite” has been reported in the mineralogical literature since long time and it has been used as synonym of the accepted mineral name vonsenite. Indeed, notwithstanding the priority of “breislakite”, some shortcomings in its original characterization allowed the description and acceptance of the term vonsenite to describe this iron borate
FERSMITE FROM BAVENO: A CURIOUS UPDATE

This article describes a sample of fersmite in micrometric prismatic crystals, with a lanceolate appearance of cream, brownish-brown color. A peculiar feature is the presence of a darker core, a sort of “ghost” inside the lanceolate crystals, clearly visible with the use of a magnifying lens
Abstract ITALIAN MINERALOGICAL MAGAZINE
nr. 3-2018
TREASURES HIDDEN WITHIN COLLECTIONS. LIVINGSTONITE AMONG CARRARA MARBLE MINERALS OF FRANCESCO BEDOGNÉ
Francesco Bedogné was a renowned mineral col- lector from Sondrio, Northern Italy. He was well known among collectors for his legendary 'demantoids drawer’, even though his mineralogical collection was made of hundreds of high quality specimens, coming from both his beloved valleys and  numerous  worldwide  localities.  As  a  con- noisseur, Francesco also had a selection of Car- rara classics (41 specimens), which were recently reviewed as a whole using modern analytical techniques: scanning electron microscopy coupled with energy dispersive X-ray spectroscopy and X-ray diffraction. The analyses led to the first identification of livingstonite on a specimen from the Carbonera quarry (Fantiscritti basin, Carrara). This is the first Italian occurrence for this rare Hg sulfosalt. The specimen was kept in the Bedogné collection with the wrong label “stibnite”.
SPHEROIDAL ANATASE FROM MOUNT CERVANDONE


Spheroidal aggregates of anatase, smaller than one millimeter in size, are brown-yellow in color, with orange-yellow hues. On the samples the spheres are quite common and line all the minerals they are associated with. They are made up of a dense aggregate of radiated crystals which, in section, branch off from the base and widen to form the spherical aggregate. Single crystals, when distinguishable, have a tetragonal pris- matic habit and a flat, pinacoidal termination.
NEW ITALIAN MINERALS. APPROVALS 2017

Eleven new mineral species having an Italian type or cotype locality were approved in 2017. Five new mineral species were first found in Piedmont  (rüdlingerite,  plumbopharmacosiderite, piccoliite,  manganiakasakaite-(La),  and marchettiite) and two from Eastern Liguria (ar- senmedaite and ramazzoite).
Clino-suenoite, from Lombardy, is a new ad- dition to the amphibole supergroup, whereas tiberiobardiite is the first new mineral species described from the ophiolite hosted ore deposits from Tuscany. Finally, verneite was found in the Somma-Vesuvius volcanic complex and rubinite is a new member of the garnet super- group from the Vigarano meteorite.
HOPPER AND SCEPTER QUARTZ.
THE FINDS OF THE D’AVETO VALLEY, IN THE EASTERN LIGURIA


Various findings made at dif- ferent times and the analogies between these specimens and those from the Western Liguria led us to the preparation of this note. In particular, an area of the Eastern Liguria provided excellent samples of quartz both in the hopper and in the scepter habitus.
The classic and probably best known location among the re- searchers is Mount Oramara, in  Vicosoprano  (Rezzoaglio), but various findings have also been made in other localities such as the old quarries of Vage, Monte di Mezzo and near Villanoce.
“SIMETITE”, THE RARE AMBER OF SICILY

Sicilian  amber,  known  as  “simetite”,  is  a  rare and precious gemstone, that has been actively sought for millennia and described by several scientists in their papers.
The actual occurrence of “simetite” has not been located yet. It is probably located in inner Sicily, since the Imera, Dittaino, Salso, and Simeto rivers transport it to the sea after heavy rains. In this case, “simetite” can be found within beach deposits, as in the famous Costa dell’Ambra in Pachino.  Recently,  new  significant  findings  of “simetite”  have  became  increasingly  difficult, owing to changes in river beds and the scarcity of rainfalls, affecting the transport of “simetite” to the beaches.
THE NEFRITE JADE OF THE MALENCO VALLEY (SONDRIO)


Alpe Mastabia, in Val Malenco, Sondrio, northern Italy, rep- resents a source of nephrite jade.  The  material,  generally light green in colour, consists mainly of tremolite amphibole, with variable amounts of other constituents, especially calcite (up to approximately 30%), apatite, diopside and sulfide minerals (molybdenite and galena). These minerals can cause significant variations in the colour of the jade. On the basis of chemical composition, we can classify this jade as dolomite related nephrite or paranephrite.
DESCLOIZITE - THE EXCEPTIONAL DISCOVERY OF SALVATORE ANGELO PINNA

In 1967, Salvatore Angelo Pinna graduated in geological sciences at Parma, soon he started the profession of mining pros- pector between South Africa and Namibia where he carried out  an  exceptional  finding  of desclozite, at Berg Aukas, from which we publish some fragments collected in his diary.
Abstract ITALIAN MINERALOGICAL MAGAZINE
nr. 4-2018

Abstract ITALIAN MINERALOGICAL MAGAZINE
nr. 1-2019
GLOBULAR CALCITE AGGREGATES FROM RAPOLANO TERME

In 1998 the author, thanks to the indications given by Giordano Cavallari and Maria Siena, started collecting in a small abandoned travertine quarry, in the area of the thermal springs of San Giovanni, close to the village of Rapolano  Terme  (Siena),  nice  globular calcite aggregates. The occurrence is represented by tabular sub-horizontal cavities within travertine, whose depo- sition has been related to the presence of some nearby thermal springs.  Calcite here forms columnar aggregates with a diameter of about 3 to 4 centimeters, and length up to 20 centimeters. Such columns are all perpendicular to the base and, in the cavities, they mostly grew downward from the roof. The calcite color ranges from pale yellow to pale orange and occasionally the tip of the longest columns have a sharp tran- sition to more saturated brown-red colour. At present, collecting at this site may be still possible but unfortunately a few years ago the place which provided for the best samples was buried by dump material resulting by the demolition of some nearby house.
CLASSIC MINERAL SPECIMENS FROM THE EVAPORITIC ORE DEPOSITS IN THE CENTRAL SICILY

The wide sulfur-bearing basin of cen- tral Sicily produced outstanding mineral specimens during the late 19th and early 20th Century, when hundreds of mines were active. Samples such as sulfur, celestine, aragonite, calcite, gypsum, hauerite, melanophlogite and baryte enriched the museums all over the world and a lot of private collections. Famous mines such as Cozzo Disi, Cianciana, Giumentaro, Floristella, Gessolungo, La Grasta provided beautiful minerals, but the definitive closure of Sicilian sulfur mines, which took place in the last years of 1900, put an end to the findings of these beauti- ful specimen.
THE ANTIMONY ORE DEPOSIT OF REMENTIL
(PERGINE VALSUGANA, TN). MINERALOGICAL NEWS AND MINING HISTORY

The mining site of Rementil is located 4 km NE to Pergine Valsugana and it is known for an antimony mineralization (mainly berthierite) hosted in the middle-lower part of the permian volcanic series of the Gruppo Vulcanico Atesino. The mining activity took place between the end of the nine- teenth century and the 1930s, with the excavation of three short tunnels Compared to what is known in the mineralogical literature, the recent re- investigation of the site has highlighted the presence of four new sulphosalts for the locality, i.e. jamesonite, zinkenite and two minerals of the plagionite group: semseyite, not yet documented in Trentino Alto Adige region, and fülöppite, a first description for Italy.
HEMATITE AND CHLORITIZED QUARTZ FROM CARRARA MARBLE QUARRIES

The quarry n. 6 “Piastriccioni C”, known among quarrymen as “The whale”, is located in the Pescina-Boc- canaglia marble basin, the western most among those present in the Carrara district. In this locality, some common minerals were collected in unusual specimens for the marble cavities. In fact, aesthetic groups of tabular crystals of hematite (in the “iron rose” variety) and chloritized quartz were recently collected.
TANTALAESCHYNITE-(Y) FROM CROPPOLA QUARRY, MONTECRESTESE (VCO)

In 2014 the works at the Croppola quarry, municipality of Montecres- tese, Antigorio valley, exposed pegmatitic dikes hosting centimetric crystals of tantalaeschynite-(Y) associated with dark blue beryl, black tourmaline, garnet, muscovite and smoked quartz.
Abstract ITALIAN MINERALOGICAL MAGAZINE
nr. 2-2019
THE SAN LUGANO MINE (CARANO, FIEMME VALLEY, TN, ITALY). TYPE LOCALITY OF FIEMMEITE AND INTERESTING COPPER- URANIUM MINERALIZATION

Collapsed  adits  of  the  ancient  mine upstream Passo di San Lugano in the County of Carano (lower Fiemme Valley) are known for their azurite and malachite  specimens,  found  in  basal levels of the Val Gardena Sandstone (upper Permian). In the last five years the study of Cu-U typical mineraliza- tions in coalified woods leads to the discovery  of  three  new  copper-oxa- late phases: moolooite, middlebackite –previously  found  only  in  the  type locality Iron Monarch quarry, Middle back Range, Australia and approved in April 2016 (IMA-2015-115) and the new mineral fiemmeite, approved in 2018 (IMA-2017-115) and named by the authors with reference to the discovery location  (Fiemme  Valley). This study describes these mineralogical findings and gives a new detailed description of the San Lugano mining site and of the more than 30 mineralogical phases associated to copper oxalates, some of which are uncommon (bariopharmacosiderite,  parnauite, plumbojarosite, tyrolite, zálesíite).
HISTORIC FOUND OF HYALINE QUARTZ IN RIO RONI, UPPER FORMAZZA VALLEY (VERBANO-CUSIO- OSSOLA)

The events related to the important discovery of hyaline quartz from Rio Roni began in the summer of 1971 when, just above the village of Riale, in the Rio Röni stream, one of the authors (Giovanni Gaspari) found a very clear fragment of quartz crystal. During five years of researches, more than  ten  fissures  lined  with  quartz crystals were found. These cavities measured between 3 and 8 metres in length and 2 and 4 metres in height. The best hyaline quartz crystals were located in the central portion of these fissures. When the cavity reached the bottom, quartz crystals up to 10 cm in length and 3 cm in diameter were also collected.
RHODONITE AND
“CLINOTHULITE” FROM VALMALENCO


Rhodonite  and  “clinothulite”  from Malenco valley are part of the mineralogical heritage of Lombardy region and were appreciated as a gemological material for their pleasant color and their workability since the last years of the last century.
These  two  minerals,  pink  in  color, have  a fair commercial  value  being very appreciated by the gemological market  for the  pleasantness  of  the color and neness of the grain which, together with their compactness, allows the realization of valuable jew- elery and objects.
BOLOGNA MINERAL SHOW
THE THEMATIC EXHIBITS OF THE 50TH ANNIVERSARY


The 50th Bologna Mineral Show was held  on  March  8-13,  2019  in  Casalecchio di Reno (BO). The thematic special  exhibits  are  among  the  most important and appreciated features of the show, and this year, on occasion of the 50th anniversary, they have been particularly rich and important. The first  exhibit  concerned  the  gold,  focusing on the specimens found in the classic locality of Brusson, Ayas Valley (AO), and gold nuggets found in several rivers in Piedmont. An additional show case was dedicated to a few representative specimens of native elements. The  central  part  of  the  special  exhibits was dedicated to the minerals from  Carrara  and  the  Apuan  Alps marbles.  15  showcases  presented  an exceptional  selection  of  specimens from private collections and from the Pisa University Museum (located in Calci). Most of the specimens have been photographed and documented in the new book “MINERALS from MARBLES  of  CARRARA  and the Apuan Alps”.
Additional exhibits included the red color in minerals, mineral fakes, and the Bagnone meteorite.
Abstract ITALIAN MINERALOGICAL MAGAZINE
nr. 3-2019
HOPPER QUARTZ
FROM PORRETTA TERME

The area of Porretta Terme, located in the Appenines close to Bologna, is famous since the nineteenth century for the occurrence of remarkable skeletal quartz crystals. These crystals belong to the classics of the Italian mineralogy because of their beauty and of the great amount of studies carried out by important Italian mineralogists such as Luigi Bombicci and Luigi Gambari. The size of the crystals varies from few millimetres to nearly 40 cm. They occur within clefts that crosscut the sandstone rocks. The main characteristics of these crystals are the presence of enhdros inclusions and the hoppered faces often filled with clay. The so called “tramogge” are cavities or geometrical voids that formed mostly in the inner parts of the main crystal faces; they represent the preferred accumulation of crystalline material along the edges of the crystal. Their origin seems to be connected to rapid growth stages and oversaturation conditions caused by quick changes in the parameters conditioning the mineralizing fluids. The historical collection of Luigi Bombicci, hosted in the homony- mous museum of the University of Bologna, includes a great number of historical samples of hopper quartz from Porretta that have been studied and catalogued by him during the nineteenth century.
ALPINE PEGMATITES
OF BODENGO VALLEY, CHIAVENNA (SO)

On the orographic left along the Mera river valley looking towards Chiaven- na, the Bodengo valley and the two lateral ones, Garzelli and Soè, are wild Alpine areas, rich in pegmatitic veins, where collecting of minerals allows you to be immersed in a still almost pristine natural environment. Start- ing from the 80s, the Bodengo valley has been mainly visited by local mineral collectors and several dikes were dug in search for large beryl crystals. In the pegmatitic veins, which host miarolitic cavities, excellent samples of beryl (variety aquamarine), smoky quartz crystals, microcline, almandine garnet, black schorl, as well as uncom- mon accessory minerals such as iron and manganese phosphates, bavenite, bertrandite, milarite, columbite-Fe and tapiolite-Fe were also collected. Bodengo valley is the only known Alpine locality of the Central Alps, to- gether with the Adamello area, were miarolitic cavities were found so far. This locality has still large potential for new discoveries of pegmatite cav- ities hosted within large pegmatites which cross-cut the hosting rocks for hundreds of meters in the Garzelli and Soè valleys.
THE ALPINE PEGMATITES
OF LOWER ISORNO VALLEY, MASERA (VB)

Isorno valley is a narrow incision that branches off just north of Antigorio valley. The first findings of pegmatite blocks date back to the devastating flood on the night of August 7, 1978 which occurred in this area. Beginning in the mid-1990s, the reconstruction of a hydroelectric plant in a cave on the left side of the valley was completed. During these works an access road was built and a number of pegmatite blocks were discovered. In these blocks we can find the classic minerals of Alpine pegmatites including blue, opaque beryl crystals, few centimeters in size, black tourmaline, in rather elongated prismatic crystals, sometimes terminated and with shiny surfaces, several cen- timeters tall, garnets in brown-reddish crystals up to two centimeters across, orange-red in color when enclosed in quartz. Uncommon minerals include yellow microcrystals of uranium-bearing phosphates and brownish opaque prismatic zircon crystals, measuring several millimeters across.
Abstract ITALIAN MINERALOGICAL MAGAZINE
nr. 4-2019
THE FLUORITE OF TERMINI IMERESE. FINDINGS AT POGGIO BALATE IN THE SAN CALOGERO MASSIF (NORD – WESTERN SICILY).

The Termini Imerese area in the prov- ince of Palermo, well known for the beauty of its landscapes, has been also  known  by  collectors  for  about 50  years  for  the  remarkable  occurrence of fluorite crystals and baryte. In particular, on the hill of Poggio Balate, in the lower part of the west- ern slope of the San Calogero Mount, excellent findings of cubic crystals of fluorite have been carried out several times. The colour of the crystals is mostly green and more rarely violet. Often fluorite crystals are associated with  white  baryte  crystal  aggregate. However, even in other outcrops in the same area of Poggio Balate, several exceptional  fluorite  specimens  have been found, making the area of Termini Imerese a unique mineralogical locality in Sicily.
SCEPTER CELESTINE OF CASTELGOMBERTO (VI).
NEW INFORMATION FROM A CLASSIC LOCALITY OF THE VENETO MINERALOGY

Celestine of the Vicenza province, occurring in the Oligocene formation of Calcareniti di Castelgomberto, has been known and well described in the mineralogical literature since more than two centuries.
Celestine occurs in cavities within the masses of fossil corals up to several decimetres wide, where it forms crystals of with various habits of the size up to 10 cm.
Since the morphological aspects of the Castelgomberto celestine have been widely treated by the authors in a recently published book, this article focuses mainly on the scepter celestine, a habit rather unusual for this mineral.
UNIQUE SCEPTER QUARTZ IN THE SKARN CAVITIES
IN THE CASTRUCCI VALLEY (MASSA MARITIMA, GR)

In recent years, in the area of the Fenice Capanne mine (Massa Marittima, GR),  large  cavities  were  discovered lined  with  amethystine  or  colorless quartz  crystals,  exceptionally  up  to 20 cm, with scepter shaped morphologies  of  remarkable  aesthetic  level. The  area  of  the  findings  is  located north of the main Fenice Capanne orebody.
It is indicatively located in the Cas- trucci valley, a tributary of Fosso dei Noni    where    hedenbergite-epidote skarn bodies crop out hosted in the “argille scagliose” formation. Usually the most beautiful cavities are located at the roof of altered hedenbergite skarn masses.
ANATASE CRYSTALS INCLUDED IN QUARTZ
FROM SOVRANA MOUNTAIN (SP)

The Sovrana mountain is a hill of 339 meters located in front of the famous Monte Nero mine in the province of La Spezia, well known for the finest inesite samples found in Italy.
This paper reports the finding of several samples of anatase, in individuals up to 2 mm, sometimes included in quartz crystals, in quartz veins embedded in the Diaspri Formation. Brookite has also been found although it is much rarer.
NEW ITALIAN MINERALS. APPROVALS 2018
Nine new mineral species from Ital- ian type localities were approved by the IMA-CNMNC in 2018. Two of the new minerals, sbacchiite and ferri-mottanaite-(Ce), were first de- scribed from Italian volcanic complexes. The former is a Ca-Al fluoride found in fossil fumaroles from Vesu- vius, whereas the latter is a new member of the hellandite group, identified in sanidinite ejecta collected at Tre Croci (Vetralla, Vico Volcanic Complex). Four new species were iden- tified from the Mn-ore deposits of Liguria, Piedmont, and Aosta Valley. Demagistrisite and bonacinaite (the latter being the first known Sc-arse- nate) were found in the Cerchiara and Varenche mines, respectively; armellinoite-(Ce) and ferriakasakaite-(Ce) are two new REE-minerals from Montaldo di Mondovì and Monte Maniglia, respectively. Two new mineral species were identified from Tren- tino-Alto Adige: fiemmeite, from Fiemme Valley, and monteneveite, a new garnet-supergroup mineral from the Monteneve mine. Finally, jahnsite-(MnMnFe) is a new addition to the mineralogy of Piona pegmatites.
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