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Mineral Specimens with Calcite
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A gorgeous miniature of transparent and lustrous of pink AND lilac-colored cobaltoan calcite rhombs from Bou Azzer, Morocco. The calcite rhomb faces are preferentially frosted, adding a very nice effect. An exceptional specimen from the recent finds. 3.0 x 2.9 x 2.0 cm
A large and simply spectacular calcite specimen! The crystals have piled up like stacks of chips into “fingers” or towers, some of them looking as though they are getting ready to topple in one direction or another. The specimen features fine luster and a pretty orange/cream color, and is in pristine condition. The variety of calcites coming out of Eastern Europe has just been astounding, and you see one after another of a type you haven’t seen before. This is a big, showy and fascinating mineral specimen! 18 x 12 x 7.5 cm
The mineral giving these calcites their beautiful dove-grey color has generally been identified as boulangerite, but I am assured by a dealer who brings them in that the mineral is actually jamesonite. Typically, these are seen as rosettes, but this one has a remarkable and beautiful sculptural form, featuring two intergrown pear-shaped clusters. Olive-colored siderite crystals decorate the display face. 9 x 5.5 x 3.2 cm
An excellent gemmy, lustrous and euhedral yellow-green octagonal datolite crystal with sharp beveled edges and a "bonnet" of white calcite scalenohedrons. The C-axis face is frosted, while the sides are glassy. A very aesthetic specimen from older mining at dalnegorsk. 5.5 x 4.5 x 2.7 cm
A beautiful and sculptural polished cabinet-aized slice from a septarian shale geode of fluorescent yellow and brown calcite lining a vug. 16.0 x 13.4 x 1.4 cm
A STRIKING, pristine CABINET plate of blue-green calcite colored by blue-green chalcanthite(?) or malachite(?) that is partially included within the calcite. The flattened rhombs of lustrous calcite from a very uncommon French locality would be good even if they were ugly, but they are NOT! This specimen even has part of a calcite rhomb that was not included with the greenish mineral on the display face! NOT very common. The lot came to market about 5 years ago and I bought much of it. It originated with somebody with contacts at the mine, which is now not only defunct, but reclaimed and protected from further mining by the French government. This is a phenomenal showpiece because the color is so shocking and frankly you have to really think about it before guessing that you are looking at calcite! 13.0 x 9.8 x 5.2 cm
Gemmy and lustrous green apatite crystals aesthetically set in parallel on sparkly pink calcite matrix. The three smaller crystals are doubly terminated. This is an unusually beautiful and unrepaired piece. 8.8 x 5.4 x 3.2 cm
A very showy and old specimen of lustrous and translucent pink calcite scalenohedrons in a quartz-lined geode from St. Francisville, Missouri. Old material of dealer Dr. Gary Hansen and not shown since the early 1980s! 9.6 x 8.3 x 7.0 cm
Fine cobaltoan calcites such as this, with big, distinct crystals and fine, deep pink color, are not easy to come by. These crystals measure to 0.7 cm, are wonderfully transparent, show sharp faces, and just the BEST pink color. One bruise towards the edge doesn''t detract from this fine piece. 7.0 x 5.0 x 4.3 cm
13.7 x 9.7 x 6.4 cm. Irai is well known for elongated scalenohedrons, perched inside amethyst pockets in some cases, or growing in isolated sprays on thin basalt shells from the lava tubes here. I have not, however, seen anything from here like this before. It is a spray of sharp, almost acicular calcites poking out like hedgehogs on the rock matrix. Each of the spherical clusters is complete-all-around, even the backside.
7.8 x 4.6 x 4.2 cm. This translucent, elongated cinnabar crystal is just a hair under 3 cm tall. It is pristine, sharp, and has a rare non-pitted face for a crystal of such size. The crystal is firmly emplaced on a sparkling matrix of quartz, and anchored in with calcite that attaches to both the cinnabar and the quartz (i.e. there is no question of possible fakery, as with some Chinese cinnabars in recent years). It glows cherry red when backlit, and is metallic dark red in minimal lighting. So, overall, this small cabinet sized specimen is one of the most elegant and aesthetic I have seen in a long time, for the classic style of cinnabar from China that redefined, in the 1990s, what collectors could expect. This piece is from the Dr. Miguel Romero collection (see his bio on the Mineralogical Record site www.minrec.org), purchased in the late 1980s or early 1990s when these first came out. Although Dr. Romero collected Mexican minerals primarily, he did assemble a small collection of aesthetic worldwide specimens of different species he found interesting. This piece then went with his collection on loan, and on exhibit, at the University of Arizona where it remained for a decade, until the family sold his collection to me. Even amongst thousands of cinnabars mined in later years this is a stunning piece of high quality that stands above the crowd.
9.0 x 6.6 x 4.7 cm. Perched aesthetically on a contrasting matrix of silvery galena and stark white calcite, is a cluster of intergrown, glassy and gemmy spinel-twinned crystals of fluorite. The fluorite cluster measures 6 cm across. Minor, white calcite crystals, to 0.75 cm in length are associated with the galena crystals that reach 0.5 cm across. This is an appealing combination specimen from Naica with lots of contrast. The aesthetic perch of the fluorite atop the stalk of matrix makes it unusual, as does the twinning so evident in the crystal itself. This is a classic color, a pastel green hue, for the locale. Probably it was mined in the 1980s. This specimen was on loaned exhibit in the University of Arizona Museum for over a decade until my purchase of this collection in 2008. Ex. Dr. Miguel Romero Collection.
5.2 x 4.4 x 4.3 cm. Botryoidal and sugary, white calcite is the matrix for two glassy and gemmy, lavender fluorite crystals, to 2.75 cm across. Both fluorite crystals exhibit stepped growth. An aesthetic miniature of a rare style for this locality. Ex. Dr. Miguel Romero Collection.
16.1 x 9.3 x 6.7 cm. A most unusual matrix of snow-white, botryoidal calcite, with spheres up to 5.0 cm across, is the host for discrete, glassy and gemmy, lavender fluorite crystals, to 2.5 cm across. Every fluorite crystal exhibits incredibly complex and dramatic stepped growth. The color contrast is also marvelous. I have not before seen fluorite of this particular style on this kind of matrix from here, and the Romero collection had just one large specimen. This specimen was on loaned exhibit in the University of Arizona Museum for over a decade until my purchase of this collection in 2008. Ex. Dr. Miguel Romero Collection.
14.3 x 9.6 x 8.3 cm. This is a major example of the species from a small find that few people are aware of, I have found. I am told it was a small pocket in the mid-1980s, and I have seen only a handful turn up as old collections recycle. These are superior to other Mexican jamesonite specimens, and most worldwide jamesonite for that matter as well, for their robust crystals and bright metallic lustre. In fact, I would venture to say these are the world's best jamesonites, for my own taste. This piece has a rich smothering of splendent, metallic-gray crystals of jamesonite to 4.0 cm across in on druse of brassy yellow pyrite. There is also a gray rhombohedron of calcite perched on top, measuring 3 cm across. This specimen was on loaned exhibit in the University of Arizona Museum for over a decade until my purchase of this collection in 2008. Ex. Dr. Miguel Romero Collection.
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Rob Lavinsky, rob@irocks.com
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share specimen![Calcite (Var: Cobaltoan Calcite) from Bou Azzer District, Tazenakht, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco [db_pics/mdpics/MD-26409a.jpg]](db_pics/mdpics/MD-26409a.jpg)
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![Calcite (Var: Cobaltoan Calcite) from Bou Azzer District, Tazenakht, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco [db_pics/mdpics/MD-26487a.jpg]](db_pics/mdpics/MD-26487a.jpg)
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![Jamesonite, Calcite, Pyrite from Concepción del Oro, Mun. de Concepción del Oro, Zacatecas, Mexico [db_pics/mdpics/MD-266056a.jpg]](db_pics/mdpics/MD-266056a.jpg)