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Mineral Specimens with Fluorite
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5.5 x 4.2 x 4.0 cm. Gemmy colorless fluorites are well-known from Dal’negorsk, in a variety of crystal forms depending on when the find occurred and what pockets the crystals have come out of. These are very unusual as far as they go: sharp simple octahedra, three intergrown ones here with the largest being 1.5 cm across the middle. These came out maybe 6 or 7 years ago, in very small numbers (compared to the cubes). Ex. Alain Martaud fluorite collection.
6.5 x 4.4 x 3.1 cm. Another very unusual AND beautiful Marty Zinn specimen. You mostly think of fluorite and calcite when you think of the Denton Mine, with baryte as an "accessory" mineral. But here, you have a stunning specimen where baryte is the star -- in the form of lustrous, frosty arch-shaped crystals on a base of yellow fluorite! The crystals measure to 1.5 cm.
5.1 x 3.2 x 2.8 cm. A large, super-sharp crystal of green fluorite from Dal’negorsk, perfectly trimmed on just a bit of supporting matrix. The crystal measures 3 cm along the longer edge. There are smaller crystals intergrown with it. The crystals have a slightly frosty luster.
10.3 x 8.4 x 4.4 cm. This is just a spectacular Spanish combo piece, as you can see. There is this incredibly aesthetic balance to it. First, you have platy rhombs of unusually transparent, lustrous blue baryte, to just under 2 centimeters on edge. Next to the barytes are clustered a number of milky, translucent calcites. And at the other end of the specimen are gemmy, golden-yellow fluorites with fantastic luster (to 1.3 cm). The whole thing comes together so beautifully! Barytes are very rare for this locality especially associated with the fluorite which is classic here. From the collection of fluorite specialist Alain Martaud, a dealer and collector in France.
5.9 x 3.5 x 3.3 cm. These are two absolutely WATER-CLEAR, gem-like fluorite crystals from Dal’negorsk - bright as diamonds in person, with beautiful bevels along the edges (this is caused by the cubic form being modified by the octahedron). They measure to just over one centimeter along the edge. The crystals are perfectly isolated in the center of the matrix.
5.4 x 4.6 x 3.3 cm. Crystals of fluorite to 2.7 cm along the edge, with interesting phantoms inside, one of them delineated by a thin, bright green stripe clearly visible inside the largest crystal. The crystals have a pretty purple rim. Intergrown with them are some stacks or columns of piled-up frosty, poker chip calcite.
15.9 x 12.9 x 8.9 cm. A cluster of HUGE octahedral crystals of rich green fluorite - of a color similar to the bright green of some familiar New Mexico fluorites, not the "washed-out" green you get from some Chinese localities. These sharp crystals, tightly intergrown, measure to over 5 cm along the middle axis! This specimen is SOLID fluorite crystals - no matrix. A sizeable and very showy fluorite specimen!
14.9 x 11.1 x 2.4 cm. The mining of these fine pink fluorites is now FINISHED. Until these pink fluorites were discovered in Mexico, Peru and the Alps were the only sources for pink fluorite. These octahedrons measure up to 1.5 cm on edge.
14.3 x 10.9 x 6.2 cm. Fluorites from the Sweet Home were overshadowed by their glorious associates, the red rhodochrosites, and were typically seen as association crystals on specimens dominated by rhodo. In this case, you have a large plate on which the fluorites are the star - pretty little light blue razor-sharp cubes, beautifully set off by slender quartz crystals and dark crystals of tetrahedrite. Dave Stoudt acquired this specimen from Collectors Edge back in 1992, when it came out. From the Rainbow Pocket.
7.2 x 6.2 x 3.5 cm. Crystals of pastel-lavender fluorite, water-clear in their interiors, isolated on matrix, to 1.5 cm. The crystals have complex modified forms. With what appears to be a modified cuboctahedron right next to a simple octahedron! There is a "window" on the largest crystal into the limpid interior. Ex. Marty Zinn Collection.
4.2 x 3.4 x 2.4 cm. Except for the matrix, you might thing this is a fine Chinese fluorite mini. But no, it is a much more rare gemmy purple fluorite from the classic Naica locality. The "star" crystal measures 1.5 cm across. It and the crystals around it have pretty bevels along the edges. Ex. Marty Zinn Collection.
10.0 x 7.5 x 2.7 cm. A showy and excellent CABINET plate covered with transparent, glassy, compound, sea-green fluorite cubes to 2.3 cm on massive fluorite matrix. The larger crystals, especially the two at the top of the specimen, very attractively feature blue-green interior phantoms. This choice piece is essentially pristine, with only very minor periphery bruising and hails from one of the famous quarries at L’Argentolle, France. Super purple fluorescence on this classic material.
6.5 x 5.5 x 5.2 cm. An AESTHETIC and DRAMATIC Erongo Mountains specimen from the Marty Zinn Collection. A gorgeous, gemmy, 2.2 cm fluorite cube is very jauntily set on a promontory atop muscovite and feldspar matrix. The pristine, large cube is beautifully two-toned, emerald-green and colorless and is nicely complimented by smaller fluorites. The fluorite cube crystal faces are preferentially water-clear or lightly frosted; a nice effect.
4.5 x 4.0 x 2.7 cm. A RARE and showy combination specimen from Kara-Oba, Kazakhstan and the Eric Asselborn Collection. Metalllic-bright cosalite needles are aesthetically crossed and included within a water-clear, sea-green fluorite cube with purple zoning. The cosalite needles are revealed through a thin, secondary fluorite overgrowth layer. Cosalite is an uncommon lead bismuth sulfide. The scattering of quartz crystals are a nice accent to this mounded, 3-dimensional piece.
2.6 x 2.5 x 2.0 cm. A sculptural cluster of blocky, lustrous, gem-like, dark purple fluorite cubes from an UNCOMMON Argentine locality - Laguna Brava, Cordoba Province. I really like the form of the perpendicular blocky cubes and the modified termination on the vertical cube. Ex. Dave and Emily Stoudt Collection. They obtained this on a trip to Buenos Aires in 2004.
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Rob Lavinsky, rob@irocks.com
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