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Mineral Specimens with Fluorite
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6.8 x 5.6 x 4.4 cm. From the extremely exciting NEW FIND at this CLASSIC locality - a superb combo specimen. On a bed of lustrous crystals of galena, sphalerite and a few chalcopyrites is a complex compound crystal of fluorite with a beautiful min-green hue. Modified, beveled cubes seem to be growing out of a central, more nebulous fluorite "base". The cubes have clear "windows" into the transparent interior of the fluorite.
10.4 x 9.0 x 2.4 cm. The mining of these pink fluorites is FINISHED now! Until these pink fluorites were discovered in Mexico, Peru and the Alps were the only sources for pink fluorite, and the cost of a specimen such as this was (and still is) astronomical from those localities. These shallow octahedrons measure up to around 1.3 cm across.
7.5 x 7.0 x 5.5 cm. Translucent, gray-green fluorite cubes to 3.0 cm dramatically and preferentially coated with lustrous, brown siderite. Ex Joseph Rawlings (#171) and Seaman Museum Collections. Rawlings was born in 1826 and worked as engineer at the Cliff and Minnesota Mines in Michigan. The Cliff closed in 1883! Super purple fluorescence.
6.3 x 4.9 x 3.0 cm. A showy and most unusual specimen from the San Martin Mine of Zacatecas, Mexico. The lustrous, gray-purple, dogtooth calcite crystals form a well-shaped mound with the largest crystals at the top. The dogteeth are altered to and have a distinctive overgrowth of purple fluorite, which in turn, have a preferential secondary overgrowth of sparkly, tan calcite. The tan, secondary calcite has moderate orange fluorescence.
10.3 x 8.2 x 4.2 cm. A SUPERB, OLD-TIME CABINET specimen of ultra-sharp, very lightly frosted, colorless fluorite cubes to 1.3 cm RICHLY scattered on contrasting rust-brown bladed barite from the famous Clara Mine, Black Forest, Germany. Moderate purple fluorescence. Choice material from the W. Leithauser Collection.
21.2 x 11.5 x 4.9 cm. This find of sharp octahedrons of fluorite in quartz about 3 years ago in China caused a big stir. The crystals range from purple to a combination of purple and green hues. This plate is rich with sharp, dark purple crystals to 2 cm, on the typical starkly contrasting thin sheet of quartz (they actually have to be etched out of this quartz after mining). This mining is FINISHED - any specimens you see now are from previous stockpiles.
6.7 x 4.6 x 6.0 cm. A classic Illinois combination - very dark purple crystals of fluorite, to 1.3 cm, in association with a cluster of etched yellow calcites. Calcite has selectively coated some of the faces of the fluorites, as well.
9.9 x 5.8 x 4.4 cm. This is just a remarkable Elmwood fluorite specimen, due to the unusual lightness and transparency of the crystals (which can often be quite dark and are usually much more opaque than this). These are very slightly golden, with just a hint of purple. They have the very distinctive gemmy corners that are unique to Elmwood (not all the fluorites from here, but some of them - and they add to the desirability). The central crystal here measures 3.6 cm across the edge. On the back of the specimen are a few crystals of sphalerite, the zinc ore that was the reason for the mine in the first place. The mine is now closed.
5.6 x 4.6 x 4.2 cm. A terrific example of the gorgeous green translucent octahedrons of fluorite from Grant County that have a look all their own. They have a smooth, melty-looking surface, and yet form well-defined octahedrons. They really light up and glow a beautiful green color under good light! This cluster has wrapped itself around a chunk of matrix, on all sides. The fluorites measure up to 2 cm along the edge. NEW FIND!
4.0 x 4.0 x 3.2 cm. A HUGE, 4.0 cm, emerald-green, partially transparent fluorite cube aesthetically set on a sliver of contrasting white orthoclase from the recent finds at the Erongo Mountains of Namibia. The cube faces are very glassy and lustrous to lightly frosted with less lustre. One corner is a sharp modified cuboctahedron.
9.1 x 7.0 x 2.8 cm. Very glassy and transparent, light olive-green fluorite cubes to 1.6 cm are richly and nicely scattered on matrix. Many of the glassy cubes have purple edge phantoms, a really nice touch and the scattered glassy quartz crystals are a beautiful accent. Super purple fluorescence. Ex. George Elling Collection.
5.2 x 4.6 x 2.3 cm. These crystals have the clarity and bright green color of the very TOP specimens that came out of Okarusu (but of course, these are WAY rarer). As is usual with these, the crystals are not large (they measure to about 0.6 cm). But these are about gemmy quality and color, along with relative rarity and locality, rather than size.
5.7 x 5.6 x 3.6 cm. Outstanding cluster of marvelous Fluorite crystals up to 2.5 cm across.
4.3 x 3.7 x 2.4 cm. The first-rate green Fluorites with purple edging from Erongo have become unquestioned classics in recent years. This lovely and very gemmy cluster, with a small amount of attached Orthoclase, has the classic purple edging that makes them so desirable. To add to the aesthetics, the largest crystal (2.5 cm across), has a clear zone on the outer part of the crystal, accenting the intense green zone below.
4.8 x 3 x 2.1 cm. Unusual and very striking set of gemmy clear Fluorites intergrown with Schorl crystals. The Fluorites, the largest of which is 2.1 cm in length, are cubes modified by the octahedron, and they all have the deep purple edging that Erongo Fluorites are famous for. The luster ranges from good to very good, and it allows one to see and enjoy the thin Schorl crystals that penetrate some of the Fluorites. There are also lustrous Schorls adjacent to the base of the Fluorites.
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Rob Lavinsky, rob@irocks.com
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