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Mineral Specimens with Quartz
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5.0 x 3.7 x 1.6 cm. Three large, sharp, discrete bornite crystals set on a contrasting quartz crystal plate from the famous Leonard Mine at Butte. The lightly iridescent crystals reach 2.0 cm, close to the maximum of 3.0 cm noted at Butte in the literature. Ex. George Elling Collection.
5.5 x 5.5 z 3.5 cm. A superb cluster of two flattened, parallel-growth, translucent and frosted, Japan-law twin quartz crystals beautifully complimented by a large single blade from the famous Washington Camp area of the Patagonia Mountains of Arizona. Ex. Richard Hauck Collection.
5.4 x 4.3 x 2.0 cm. Epistilbite is much less common than stilbite from the Deccan Traps of India and this is a fine combination specimen from Jalgaon. A 1.7 cm, saw-tooth-like cluster of glassy, translucent, colorless, parallel-growth epistilbite crystals is set in a curved vug in basalt matrix filled with very glassy, transparent, light purple amethyst crystals. Ex. Dr. Steve Smale Collection.
5.1 x 1.2 x 0.9 cm. A huge elongated and modified rhodochrosite scalenohedron triply coated with sparkly light purple fluorite and quartz microcrystals and iron oxide from the famous Santa Eulalia District of Mexico. Ex. Dave Stoudt Collection.
5.7 x 4.3 x 4.2 cm. A superb specimen of at least five super-sharp, tan, talc pseudomorphs after quartz crystals and talc pseudomorphs after dolomite rhombs, all set in massive talc matrix from a renowned locality for this rare replacement - the Johannes Mine, Bavaria, Germany. Ex. H. Westenberger Collection.
6.2 x 4.0 x 3.2 cm. A wonderfully transparent and glassy crystal of smoky quartz from the famous Brandberg quartz locality made particularly interesting by areas of skeletal growth both on the faces and enclosed inside the crystal (engulfed during growth). Ex. Richard Hauck Collection.
5.6 x 1.4 x 1.4 cm. Orange-red gem spessartines are sprinkled all the way around the transparent, doubly terminated smoky quartz crystal.
5.9 x 4.9 x 3.0 cm. Amethyst from Las Vigas is famous for the reasons you see in this specimen: the gorgeous transparent lavender crystal terminations and glassy luster.
6.6 x 1.4 x 1.2 cm. This crystal has a clarity and glassiness equal to that from anywhere in the world. But more importantly, it has subtle blushes of purple and smoky hues inside. Ex. Richard Hauck Collection.
4.2 x 3.2 x 2.2 cm. A rare specimen from Israel, a hedgehog of milky quartz crystals. Ex. Richard Hauck Collection.
6.2 x 2.2 x 1.9 cm. This is a bizarre quartz specimen. The familiar hexagonal form is expressed in dozens of stacked hexagonal disks that form a column. It is thought that these occur because of growth inhibition by calcite. Ex. Richard Hauck Collection.
5.9 x 5.9 x 3.9 cm. This is a New Hampshire old-timer. There is such a great balance between the smoky quartes (of fine quality) and sharp microcline crystals, which actually have the merest hint of blue to them. Ex. Richard Hauck Collection.
10.9 x 5.8 x 4.8 cm. Here you have a tall, elegant, very complex compound crystal with dozens of sub-terminations climbing up the sides all around. At the base of the big crystal are conventional crystals mixed in with sceptres. A very unusual Eastern European specimen. Ex. Richard Hauck Collection.
3.2 x 1.1 x 0.8 cm. A fine thumbnail sceptre of amethyst from Washington state, with a gem of a purple cap atop the milky stalk of the crystal. Ex. Richard Hauck Collection.
6.9 x 4.8 x 3.2 cm. A fine doubly-terminated compound crystal from Larimer County, Colorado. The crystal is purple at the ends with broad white banding through the centers. Ex. Richard Hauck Collection.
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Rob Lavinsky, rob@irocks.com
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