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Mineral Specimens with Andradite
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5.2 x 4.1 x 2.3 cm. I have only seen a handful of these specimens over the years, and I always keep an eye out at shows for them because they're some of the better Demantoids outside of Europe/Russia in the world in my mind. This hand-sized specimen hosts dozens of small, sharp, highly lustrous, gemmy, bright green modified dodecahedral crystals of Andradite (var "Demantoid") on schist matrix. PLEASE NOTE that these crystals show a color change from a "mint green" color to a very rich "lime green" hue in different lighting. Under halogen lights, the crystals appear more pastel, but under mercury bulbs, the color is very intense. The beautiful color contrast on this piece is truly eye-catching, and it is not common to find cabinet sized specimens of this rare green Garnet.
2.6 x 2.5 x 2.1 cm. A fantastic 1.8 cm-on-edge crystal of Hausmannite sitting perfectly on a bed of red crystalline garnets. The Hausmannite has excellent sub-metallic luster, and is growing in its classic pseudo-octahedral form. There are even advanced late-stage pseudo-octahedrons forming on some of the corners. This is a superb and aesthetic specimen. Ex. Wendell E. Wilson Collection.
4.2 x 3.1 x 2.1 cm. Very sharp, splendent, jet-black, tetragonal hausmannite crystals intergrown in striking pagoda-like clusters and set beautifully on matrix of drusy andradite garnet. The excellent luster causes these crystals to sparkle even in medium light. An excellent specimen by any standard. The world’s finest hausmannites come from the Kalahari Manganese Field and this is a very fine example.
9.2 x 6.7 x 5.8 cm. Gaudefroyite is a very rare manganese borate compound. Lustrous, black, hexagonal gaudefroyite prisms to 8 mm are richly strewn on this fine example of the gaudefroyite/andradite/baryte combination specimens. The gemmy, bright to dark cherry-red andradite garnets are a nice compliment, as are the snow-white barytes. The best gaudefroyites in the world come from the Kalahari Manganese Field and this is a highly representative and fine example of the combination species. Ex. Wes Parker Collection.
6.6 x 6.5 x 3.3 cm. Sharp, lustrous, reddish-brown andradite garnet dodecahedrons to 3.3 cm are set on both sides of the sculptural muscovite schist matrix. The andradites even have tiny flashes of gemminess and the impression of a large missing garnet in the schist is interesting. This is old-time, rare material from an uncommon Norwegian locale in Nordland. Ex. Dennis Mullane Collection and comes with a handwritten label with a 1973 date. I have never seen a specimen from this locale.
11.2 x 8.0 x 3.6 cm. A really fine locality garnet specimen, with 1 cm crystals completely covering this matrix plate.
9.0 x 7.0 x 6.8 cm. Lustrous, translucent, olive-green andradite garnet crystals to 1.0 cm cover the sculptural, vuggy, mounded matrix on this fine specimen from Stanley Butte, Arizona. The lightly frosted crystals really sparkle and have textbook dodecahedral form. Classic, older material from this noted locale from the Robert Fender Collection. This piece dates to the 1960s or 1970s.
6.7 x 6.1 x 4 cm. Extremely high lustre, good size, and fine aesthetics make this one of the very best such specimens for the locality, which is near to where the Calaveras axinites were found long ago. Garnet, however, is much rarer and this is thus a significant locality specimen. Ex. Irv Brown Collection.
10.5 x 7.5 x 5.5 cm. Charlie says he obtained the two best specimens of a small pocket, found some time ago. This one features a spray of upright columnar hematite crystals to 6 cm leaping off from andradite garnet matrix. No damage and complete-all-around - it is a magnificent specimen period and a truly unprecedented hematite. Ex. Charlie Key Collection.
5 x 5 x 3.5 cm. A sharp, lustrous, very well-formed garnet crystal measuring just over 2.5 cm across, here lays well-exposed on a nicely trimmed matrix. I had never seen one of these before myself, and so I showed it to a few people who know better the more uncommon European material - and they were very impressed. It was mined from the Upper level of this (much older) mine in 1960-1962 and was apparently a one-time find of just a few specimens. I am told by Leithauser and others that this is one of the very best, of the top few pieces. Formerly in the collection of noted German collector Paul Stahl and sold to Leithauser by German dealer Helmut Brueckner.
2.7 x 2 x 1.3 cm. This is one of the fantastic new garnets written up in the What's New from Tucson report recently, by Tom Moore. It is an exquisite pair of highly modified Demantoid Garnets that mirror each other and grow around a small core of tiny Demantoids. The larger crystals are blue-green, partially gemmy, and highly lustrous. The color and brilliance does not come through here. This specimen is much better in person. Quality Demantoids are very rarely seen in this size, color, or brightness. A great thumbnail from a rare locality as reported in the recent issue of the Mineralogical Record, as I said.
7 x 7 x 6 cm. A cluster of intergrown garnet crystals, reaching to 2.5 cm across, glow with a splendent luster. The crystals appear black but have gemmy orange highlights when lit well. It is about the brightest garnet lustre I have seen. They glisten with intense almost-metallic luster.
7.4 x 4.5 x 2.0 cm. Discrete, intense apple-green, gemmy and lustrous andradite garnets variety demantoid are richly strewn on the sculptural matrix on this fine piece from a new 2009 find at the Jeffrey Mine. The crystals reach 5 mm and are dodecahedrons modified by the trapezohedron. The gemmy green crystals are beautifully complimented by the snow-white amphibole on the serpentine matrix. There are even more gems on the back, as an added bonus.
8.8 x 7.4 x 6.4 cm. A huge, extremely rare andradite garnet from a very uncommon California locale - the Miracle Mountain Mine in Amador County. This is an old-time specimen. It has a wonderful reddish-brown color, complex crystallization and excellent lustre. This superb piece was for many years part of the Pala Properties/Bill Larson Garnet Collection and was on display at the Fallbrook shop. An outstanding large specimen from this rare locale.
7.1 x 5.6 x 2.8 cm. Recently (2008-2009), there was a discovery of some of outstanding quality Demantoid Garnets in Madagascar. The quality and color of these crystals rivals pieces I have seen from Italy, Namibia or even Russia. This specimen hosts dozens of very sharp, highly lustrous, excellent quality, rich green color, gemmy, modified dodecahedral and trapezohedral Demantoid crystals on a contrasting white matrix. The luster on these crystals is superb for Demantoid, and the largest crystal measures a full 8 mm, which is very good sized for the find. Please note that under halogen lights, the crystals appear a bit lighter in color, but under mercury bulbs, the color is very intense.
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Rob Lavinsky, rob@irocks.com
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