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Mineral Specimens with Quartz
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Sparkly quartz crystals have covered octahedrons of green fluorite (you can faintly see the green color coming through, and the octahedral shape is preserved) in this relatively large, showy specimen. 12.5 x 8 x 3 cm
5.3 x 4.4 x 3.6 cm. This find has turned out what are widely considered amongst the best amethysts ever found in America. They have an intense lavender glow about them that is reminiscent of Bolivian amethyst (but of course, good specimens are much scarcer from this find). With its fine glassy luster and wonderful glowing color, this specimen embodies what makes these so sought-after; this was mined by and is from the personal collection of mine co-owner Ryan Bowling, author of a recent article on this quarry.
6.8 x 3.6 x 1.9 cm. Amethysts from Brandberg are prized by collectors for glassy luster and gemminess, but most of all for the subtle and beautiful "blushes" of purple color. Here you have a single fine crystal, with a little accenting sidecar crystal attractively leaning out from its base. Inclusions appear to be both iron oxide and lepidocrocite. There is at least one little moving bubble inside a water pocket ("enhydro").
10.7 x 6.9 x 0.7 cm. An exceptionally fine and beautiful example of a slice through an amethyst crystal-covered quartz stalactite, in this case two stalactites that have grown together. You can see their "cores" and the radial crystal growth outwards from them, culminating in the purple amethyst crystals that wrapped the double-stalactite as it was found in the vug. Polished on both sides. Ex. Richard Hauck Collection.
This Photo was Mindat.org Photo of the Day - 14th Jun 2009
16.4 x 13.0 x 5.1 cm. A large plate of milky quartz crystals from old Ouray finds, out of the Hauck collection. This specimen was either a ridge that was exposed on both sides in the pocket or it was loose in the pocket, because crystals have formed on both sides, and there are even some doubly-terminated crystals that have grown around its sides. Classic old material from Colorado.
11.3 x 1.6 x 1.4 cm. These Jequitai quartz crystals are so distinctive and stunningly pretty. They are water-clear, and the faces alternate between absolutely glassy ones and faces with subtle horizontal striations that give them a silky look. As you can see, the faces alternately widen and narrow as the crystal tapers down towards the termination, and there are horizontal steppes where the narrowing occurs. Ex. Richard Hauck Collection.
8.2 x 7.5 x 7.0 cm. Two "books" of large, pearlescent, tan muscovite crystals (the larger book is over 8 cm across!), lean out dramatically from one another on quartz matrix. They have a pretty, shimmering silver appearance, like fish scales, caused by the stepped-growth. Old material. Ex. Richard Hauck Collection. Probably from the old Conselheiro Pena locale.
4.9 x 2.4 x 2.2 cm. It is unusual to see a freestanding, doubly-terminated floater quartz crystal from Brandberg. This one features the usual fine clarity and blushes of smoky color that make this locality famous.
8.4 x 5.9 x 3.2 cm. Despite the profusion of mineral specimens that have poured from China over recent years, fine amethyst specimens are not common from there. This one, out of the Hauck Collection, is very unusual and pretty, in that the bodies of the crystals are milky, while the termination faces are a beautiful glowing purple - with a color reminiscent of Bolivian or Georgia amethyst.
12.2 x 11.4 x 5.2 cm. A large, very aesthetic and dramatic specimen of stacked, doubly-terminated milky crystals from Maine that have grown in parallel on the matrix, giving the specimen beautiful overall form. That big crystal measures over 9 cm; you can see how it is not only multiply-terminated at one end, but has interestingly grown around another crystal. Ex. Richard Hauck Collection.
7.5 x 6.2 x 5.0 cm. Smoky quartzes are known from North Carolina, but rarely in large, "Swiss"-like gemmy crystals such as this. All the anomalies you see are internal to the crystal: the faces are clean, smooth and glassy. On the back of the crystal are platy muscovites. Ex. Richard Hauck Collections.
8.4 x 4.9 x 3.4 cm. Compared to the usual Tongbei spessartine specimen, these crystals have a slightly silky luster to them that is really pretty - even compared to the usual adamantine luster. What is more, they are very transparent, as the slightly less reflective faces allow better vision into the gemmy interiors of the crystals. Finally, they have good size to them as well - to 0.7 cm.
9.0 x 5.2 x 4.1 cm. Highly lustrous, very lightly iridescent, brassy, twinned and untwinned chalcopyrite crystals are aesthetically scattered in a "forest" of translucent, milky quartz crystals from the Bandora Silver Mine of San Juan County. Ex. Dave Stoudt Collection.
8.3 x 7.2 x 5.4 cm. Superb, large and discrete stannite crystals are attached to the front of a pristine, glassy, nearly transparent, complete all-around quartz crystal from the Yaogangxian Mine of China. The lustrous, silver-metallic stannite crystals reach 1.5 cm on this striking specimen, which is nicely accented by the sidecar quartz crystals. Ex. Steve Smale Collection.
5.1 x 4.3 x 3.2 cm. A very fine and showy quartz cast after fluorite crystals from the Martyn Zinn Collection. The super-sharp, 2.3 cm, pastel-pink, pyramid/octahedron is a stunning highlight to this excellent piece. The back features pink fluorite and sharp fluorite casts.
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Rob Lavinsky, rob@irocks.com
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