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Mineral Specimens with Quartz
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7.4 x 3.6 x 2.1 cm. This is an old Colorado specimen of "yellow quartz", which gets it very attractive color from inclusions. There is one large crystal, with several smaller ones leaning out from it. The crystals are transparent and sharp. This specimen came out of the collections of Edna Doughty to Richard Hauck.
8.9 x 6.9 x 4.4 cm. This is a knob of milky quartz crystals radiating from a central point. One half of the quartz cluster is covered with little translucent calcites with pyramidal terminations. Formerly in the collection of Caldwell College in New Jersey in addition to the Hauck Collection.
11.6 x 7.8 x 4.2 cm. A beautiful South Carolina amethyst specimen, where the crystals have formed on a sheet of amorphous quartz that is covered on the back side with milky quartz crystals. At the top of this specimen are silky crystals with a greater saturation of lavender color. At the bottom is a crystal that looks like a jewel: glass-clear, with just a faint blush of purple. For size reference, this crystal measures 3.8 cm. Ex. Hauck Collection.
9.2 x 5.5 x 4.4 cm. This is an older specimen out of the Hauck Collection, and the exact locality is is not specified, but it does not look like anything that has come out of this locality anytime recently. It is a cluster of orange brown crystals, to 2.5 cm, with an unidentified inclusion providing the color.
13.9 x 4.1 x 3.4 cm. A very large, transparent, slightly smoky quartz crystal, in fine condition, is richly shot through with needle-like crystals of dark green elbaite tourmaline. This dramatic crystal was from a 1996 find at the Jaquaracu locality. The tourmaline crystals are massed in a dense, brushy cluster around the middle of the quartz crystal, and then sparser up towards the termination, allowing the light to get through and really showing off the tourmalines. Ex. J. R. Glover & Hauck Collections.
10.9 x 10.4 x 0.8 cm. A large, spectacular slice through three large quartz/amethyst stalactites that grew together - each of them originating as a pair of smaller stalactites that had themselves grown together, as you can see from the double "cores" inside each of the three amethyst-lined large stalactites. Ex. Richard Hauck Collection.
4.9 x 4.4 x 3.2 cm. From the superb collection of W.H. Leithauser of Germany, an exquisite Indian combination specimen. There is a natural "pedestal" of finger-like chalcedony stalactites intergrown with sharp, gemmy colorless apophyllites. Atop this pedestal, crosswise, is a hematite-included "book" of heulandite.
10.9 x 3.4 x 2.4 cm. A stunning, large crystal of smoky quartz from the Erongo Mountains, and distinguished by having schorl tourmaline crystals shooting through its interior. The crystal is doubly-terminated, and has a tabular crystal growing across one of its faces, making it even more interesting (seeing these two habits intergrown with one another on the same specimen, again very unusual for Erongo).
4.9 x 2.9 x 2.3 cm. Just a pretty miniature of Blanchard fluorite, suffused with the gorgeous "Blanchard Blue" teal color, but in the case of this pocket, with dark purple outlines around the crystals. They are beautifully isolated on a bed of quartz.
8.9 x 7.4 x 3.9 cm. Sparkly, stalactitic dove-grey chalcedony provides a pretty setting for bowties of peachy-pink stilbite.This specimen is actually beautiful on both sides, with stilbites all the way around it - it has only two contact "feet" on the bottom and no matrix - the rest of the specimen is all chalcedony and stilbites.
5.0 x 4.4 x 2.8 cm. Stunningly gemmy crystals with the famous subtle purple "blush" that makes these amethysts stand out amongst worldwide amethysts. The crystals here are attractively grouped at one end of the matrix, in beautiful condition. Ex. Stoudt Collection.
5.9 x 4.4 x 1.4 cm. Here is a very unusual old Montana amethyst specimen that came with an old Schortmann’s label. It features a flat shard of colorless quartz, upon which have grown three flat, tabular, very gemmy crystals of amethyst, with multiple terminations (some of them conventional prisms) shooting out of their sides. Ex. Richard Hauck Collection.
4.9 x 3.9 x 0.1 cm. Though India is not a big producer of amethyst specimens, there are more than a few localities. At any rate - it is the beauty of this slice that makes it appealing, with the hexagonal form being repeated several times in the interior as zoning or phantom lines. Polished on both sides. Ex. Richard Hauck Collection.
This Photo was Mindat.org Photo of the Day - 1st Mar 2009
13.0 x 3.2 x 2.8 cm. A stunning spire of clear Alpine quartz, out of the Wein collection of Europe. The form of this crystal is quite unusual, with its meandering edge delineations and wavy tapering form. Striations on the faces give it an attractive silky luster.
2.5 x 1.4 x 1.2 cm. Fine, sharp bournonite crystals have always been very rare, until the finds at Yaogangxian starting turning up. Here is a superb thumbnail, with a spray of quartz crystals attractively slanting across it.
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Rob Lavinsky, rob@irocks.com
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