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Mineral Specimens with Quartz
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24.5 x 16.5 x 3.9 cm. A superb large cabinet plate from the mines at Naica, Mexico. Lustrous and translucent, sea-green fluorite cubes to 4.2 cm with an infinite number of second-generation fluorite overgrowths aesthetically scattered on massive sphalerite matrix covered with a variety of quartz forms. This fine, old-time piece dates to the 1970s. Ex. Brent Lockhart Collection, purchased in 1975.
11.4 x 6.2 x 6.2 cm. This is a beautiful, complete-all-around stalactite of rich royal purple amethyst from the mines in Artigas, Uruguay. This locality produces the best amethyst stalactites in the world, with a more vibrant purple color than material from Brazil. Admittedly, it is not pristine (most are not), having a few minor dings and one small broken crystal on the back, but it is overall in very good condition and has excellent top terminations with more individual definition to the crystals than usual.
5.2 x 4.2 x 3.2 cm. This is a superb specimen of Vera Cruz amethyst. The crystals are like jewels. What is more, they are in an incredibly aesthetic arrangement on the matrix, spread evenly and pointing in every direction. Ex. Richard Hauck Collection.
4.4 x 3.4 x 2.8 cm. An aesthetic example of this classic combination from the Spruce Ridge pyrite and quartz deposit located near the crest of the Cascade Range in Washington and first explored in the 1950s by Bear Creek Mining. The quartz points, with a slight orange tint from hematite inclusions, decorate the sides of a fine, golden-metallic floater crystal of pyrite. Ex. Dick Jones Collection (assembled in the 1960s-1970s).
6.1 x 4.5 x 2.0 cm. This combination from Tongbei is a very familiar one. Generally, however, you see a plate of feldspar with a field of spessartines and some smoky points sticking up. But here, the combination has formed a free-standing cluster with very little matrix present at all.
4.9 x 3.9 x 3.0 cm. An aesthetic, complete-all-around cluster of gemmy and lustrous amethyst crystals from a new find at Las Vigas, Mexico. The crystals are very glassy and have excellent, purple color. Very nearly pristine. Ex. Consie Prince Collection.
9.9 x 8.0 x 7.5 cm. From the quartz suite of the noted Richard Hauck Collection, a specimen of amethyst that is really outstanding for India, and actually pretty outstanding for anywhere. It is a knob of crystals that have grown radially out from a central point. The crystals have wonderful clarity, with a pretty purple blush to them and super-gemmy tips. What is really distinctive is the peppering of tiny balls of acicular mordenite crystals, which are embedded in the surface of the amethyst crystals.
18.0 x 13.4 x 8.0 cm. A museum piece out of the Richard Hauck Collection. This is a large, spectacular landscape of glittering amethyst crystal stalactites. The crystals have the wonderful purple glow and clarity Artigas is known for.
6.4 x 2.2 x 2.2 cm. This is a superb quartz crystal out of the quartz suite of the noted Richard Hauck Collection. This is an older piece. It is a doubly-terminated, complete floater crystal, with the most amazingly perfect textbook form I have personally ever seen in a quartz crystal. It has milky color, and at the two terminations is very slightly amethystine.
7.4 x 3.4 x 3.4 cm. A superb example of quartz sceptering, from this classic of American sceptre localities. This slightly smoky crystal flairs out dramatically around mid-way up the stalk to a transparent, slightly golden cap. The top of this sceptre lights up like a light bulb under good lighting. Ex. Richard Hauck Collection.
5.0 x 3.1 x 0.4 cm. This is a superb miniature of faden quartz - with the crystals having grown in parallel, and the frosty faden line clearly visible running through their centers. There is just the one contact on the end where the cluster was attached - all the other edge terminations are sharp and perfect (there is a euhedral natural contact in one place where one of the crystals grew against another). An exquisite example of this mysterious quartz phenomenon. Ex. Richard Hauck Collection.
5.9 x 4.9 x 4.5 cm. A specimen of milky quartz from the old Idarado Mine locality, and it is a really strange one. The sloping sides of the crystal show hundreds of microfaces, and then these faces end as the crystal sharply tapers up to the termination showing horizontal striations. Ex. Richard Hauck Collection.
6.0 x 5.5 x 4.5 cm. A superbly sculptural specimen of ferberite on quartz. The ferberites are complete all the way around, with the only attachment contact being shared with the bottom contact face of the quartz. The luster is absolutely fantastic, and there are complex faces flashing everywhere along the sides of the crystals running along the top of the specimen, with sharp chisel terminations jutting out to the side.
4.9 x 4.9 x 3.5 cm, 4.5 x 3.1 x 3.1 cm. Two elegant miniatures of Vera Cruz amethyst. One is a "V" of two elongated crystals on a sparing matrix; the other is actually two clusters cemented together by the growth of one of the quartz crystals on one cluster into the other cluster.
2.9 x 2.4 x 1.1 cm. The Green Monster Mine on Prince of Wales Island is of course best-known for its epidotes. And while quartz is a typical association there, Japan-Law twins from this locality are rare (as they are from just about everywhere, for that matter). Those that have been found are generally smallish, as this one is. This specimen was collected by Doug Toland, who wrote the 2004 Mineralogical Record article about collecting at this locality (September/October Issue). The two crystals have frosty phantoms inside. Ex. Richard Hauck Collection.
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Rob Lavinsky, rob@irocks.com
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