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Mineral Specimens with Gypsum
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6.7 x 5.4 x 3.4 cm. Selenites are quite common from the Naica, Mexico area, but you do not see many worldwide specimens. Here is a rare one from one of the former Soviet republics, showing the same intense glassy clarity that makes some selenites so striking. What is unusual here, as compared to the Mexican ones, is how the selenite here is nicely set on multicolored blue on red celestine matrix. You can see through the flat "windows" into its clear interior.
19.4 x 7.2 x 6.5 cm. A STUNNING 18-cm crystal of selenite, a fishtail twin, terminated, complete and undamaged! It juts majestically at an angle from a natural base of massive selenite. This dramatic crystal has fine transparency as well. Showy and magnificent!
4.6 x 4.4 x 3.0 cm. The Fuentes de Ebro quarry in Spain produces world-class gypsum specimens and this one is no exception. Two, gorgeous, water-clear fishtail-twinned selenite crystals are boldly upright on snow-white alabaster matrix. The large crystal is 2.9 cm. This beautiful and aesthetic specimen is from the Marty Zinn Collection. Old material from the early 90s, late 80s...not available today! Valued highly, in fact, now that they are gone.
6.0 x 5.3 x 4.7 cm. A STRIKING and showy specimen of green atacamite crystals embedded in and on water-clear selenite crystals on matrix from the one-time find at the Lily Mine of Peru, 6 to 8 years ago. The two vertical selenites, with atacamite, are stunning, as is the large, television-like selenite, with the atacamites visible in the interior, like a garden. Very nearly pristine, with only a trivial bit of bruising, mostly on the periphery.
12.7 x 11.9 x 6.4 cm. Goethite comes in so many forms, sometimes just ugly and boring, other times just plain WEIRD. This type from Chihuahua falls into the "weird" category - a pocket of piled-up, hollow stalactitic tubes as it has cast and replaced selenite, with the luster and color of chocolate. Acquired by B.E. Lockhart in 1972.
7.9 x 4 x 3 cm. Some of the best, if not the best, Selenite crystals have come from the Naica district. This lustrous sharp beauty sits very aesthetically on matrix.
18.2 x 12.2 x 8.1 cm. A large cluster of golden-orange, disc-shaped crystals of gypsum, transparent and lustrous, in fine condition! This big, showy specimen came out of the collection of Ed David. Large piece, great condition, very impressive…It’s just a selenite maybe but what a color! This find is/was really popular, but the good one shave not been around in awhile.
6.5 x 4.1 x 1.7 cm. An exceptionally aesthetic pseudomorph from the famed Santa Eulalia District of Mexico. Sparkly, botryoidal, tan mimetite covers a sharp and complete all-around goethite after gypsum crystal on mimetite-covered goethite matrix. The back of the pseudo has a very distinctive groove and the lightly contacted termination reveals the inner core of goethite. Certainly not a detraction, but in fact, a "revelation". This is an oddity - have not seen the like before. Ex. Brent Lockhart Collection.
5.7 x 4.6 x 3.0 cm. While certainly no competition for a good Italian sulfur, this is an old-timer NEVADA sulfur that with well-defined, translucent-to-transparent crystals to just under 1 cm - something very hard to come by now. Ex. John Ydren Collection.
8.7 x 3.7 x 1.8 cm. A VERY FINE, SUPER RICH and SHOWY specimen of bright, micro-dendritic copper in a sawed, transparent gypsum cleavage from the Mission Mine of Arizona. Old and very choice material. Such thick windowpane slices with such rich forests of copper inside are almost never available! In person, looking at the internal meshwork, you can see how mesmerizing this is and why it is such a classic. Ex. Stoudt Collection.
6.2 x 4.9 x 2.4 cm. An unusual Naica selenite specimen, in that instead of being clear of whitish, it has some color to it from limonite inclusions, and a sharp PHANTOM that shows up well in the center due to a richer level of this inclusion. Smaller crystals are all over the limonite matrix. From the well-known California collection of Charles Hansen.
14.2 x 9.2 x 5.8 cm. A LARGE and stunning specimen from Eastern Europe out of the collection of Dave Stoudt, featuring highly distorted rhombohedrons of calcite that appear almost as books of petals, piled up 3-dimensonally on the matrix.
5.2 x 3.4 x 2.9 cm. These strange floater balls of gypsum crystals formed deep in clay beds in the floodway of the Red River, and have been mined there (with a lot of labor) since the 60s. They are truly beautiful, particularly when you have just one or two twinned crystals rising from the rest of the ball in isolation, as here.
11.8 x 8.3 x 8.0 cm. Dave Stoudt was stationed in Poland for 10 years, and had the opportunity to obtain specimens from old and generally closed localities, in addition to some interesting contemporary things many of which did not reach the general market. Searching out retired miners in their homes, he got some neat things and made up a Polish minerals collection that was amazing! You have seen gypsum in all sorts of forms, from the giant "swords" of Naica, to the balls of gemmy twins from Winnipeg. Here is an amazing single, huge crystal shaped like a CLAM, with a razor-sharp edge. It was sliced off at the base to remove it from the pocket in which it formed, and you can see that it is transparent inside. It is translucent, with an amber color, from the outside. What a cool crystal!
4.2 x 4.0 x 2.3 cm. This is a classic, and now very hard to find specimen of Gypsum included and associated with gemmy, DEEP emerald green color, prismatic Atacamite crystals. The main Gypsum crystal is in excellent condition, showing a wonderful "sword"-shaped form, and is nearly water-clear throughout. Some of the Atacamite crystals are suspended inside of the Gypsum, but others are free-standing against the micro Quartz matrix, where they can be backlit to show their amazing color. The piece is in good shape overall, with some minor bruising which does not take away from the appeal or attractiveness. These specimens came from a one-time find at the Lily mine about 7-8 years ago, and are some of the most attractive "new finds" from Peru in recent memory. Ex. Richard Kosnar Collection.
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Rob Lavinsky, rob@irocks.com
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