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Mineral Specimens with Elbaite
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8.3 x 1.7 x 1.4 cm. A beautiful, bi-colored, watermelon-pink and green tourmaline from the Cruzeiro Mine and the Steve Smale Collection. The vivid pink of the main termination, lower sidecar crystal terminations and the superb, pure gem, sideways crystal are outstanding adjacent to the gemmy and lustrous, green, main body. The main termination is very complex and is partially etched on one side. Really interesting features of this crystal are the bent, healed fractures of the green body of the crystal. The healed areas are filled with pink tourmaline. Some very interesting crystal chemistry and tectonic forces in the pocket during crystal formation. Tourmalines of this old-time quality were produced in the 1960s and 70s, while Steve lived and worked in Brazil.
5.6 x 0.8 x 0.8 cm. A beautiful, bi-colored, gem tourmaline from recent finds at the Pederneira Mine of Brazil. The lower half of this lustrous crystal is a very pleasing teal-blue, which grades upward to emerald-green. The steep, black pyramidal termination, with intriguing etched faces, tops off this excellent crystal. A classic Pederneira bi-color tourmaline.
5.6 x 1.1 x 1.0 cm. A beautiful, gemmy and lustrous, bi-colored, sceptered, green tourmaline with a pink base and striking pyramidal termination with intriguing etched faces. This fine, uncommon, older specimen is from the Barra de Salinas pegmatites of Brazil and the Steve Smale Collection. Pristine and complete-all-around. Some unusual etching took place at the base of this striking crystal. Weighs 12 grams.
4.7 x 3.8 x 2.3 cm. A fine specimen of a 4.7 cm, gemmy and lustrous, zoned indicolite tourmaline aesthetically wrapped in very pastel-pink lepidolite blades. The indicolite is beautifully accented by a water-clear, doubly terminated quartz crystal.
6.9 x 0.7 x 0.6 cm. A beautiful, gemmy and lustrous, bi-colored, pencil tourmaline from the Himalaya Mine of California. Most of the crystal is the classic Himalaya "watermelon-pink". The upper third of the crystal has a green core, with a pink exterior. A classic, watermelon-pink, Himalaya tourmaline. Weighs 6 grams.
9.3 x 3.1 x 1.2 cm. A very unusual tourmaline specimen from the Cruzeiro Mine. This is a concave-convex, tapered fan of parallel-growth, gemmy and lustrous, olive-green tourmaline crystals. The tourmalines in the upper part of the fan are in a line in single-crystal growth with the smaller, sidecar crystals below. Older material. Weighs 19 grams.
10.2 x 8.7 x 6.6 cm. A complete quartz crystal literally enveloping an elongated dark green tourmaline. We have all seen tourmalines sticking out of quartz, but seldom do you see so much tourmaline embedded in a quartz, and then further to have it be a balanced, aesthetic specimen...very uncommon. In person, the tourmaline is somewhat translucent and has color, by the way, though it is hard to photograph. Weighs 655 grams.
4.4 x 1.9 x 1.7 cm. This mine is known for its etched tourmaline stalks, not for robust, gemmy, fat crystals. So, for this mine, a normal robust tourmaline such as this one is quite unusual. Although the termination is multiple, it is not etched, and has sharp faces on all the mini-terminations except at the far right edge. The rest of the faces are smooth and pristine down to near the base. The color saturation and patterning is very rich, and classic for this locality. Weighs 22 grams.
7.1 x 3.0 x 2.7 cm. This quartz has a bi-colored tourmaline nestled in its terminations. The color is a slight citrine hue, though not intense. The tourmaline is an attractive bicolor, crudely terminated (as if the termination broke and re-healed during growth).
5.8 x 1.3 x 1.2 cm. A completely gemmy tourmaline with superb evergreen-green color and total transparency when strongly backlit. Weighs 15 grams.
6.6 x 3.9 x 4.4 cm. An unusual cluster featuring a very translucent tourmaline poking out of a mass of tourmaline and lepidolite. Also rising up in tandem is a lepidolite crystal (a real crystal, not just massive material). The mass of tourmaline, and the tourmaline attached to the lepidolite, is damaged but colorful. The main, centerpiece tourmaline is pristine, stands 2 cm tall and has a very intense blue cap.
7.9 x 5.6 x 4.1 cm. This specimen is a solid mass of gemmy green tourmaline, with a 5-cm-long central crystal, all draped in sparkling lepidolite. Luckily, instead of coating the entire piece, the lepidolite has provided just the right contrast to make this a pretty piece. The lepidolite are sort of beige in color, quite different from the new material on other pieces here, but classic for this particular mine. The main crystal is pristine and complete (though the secondary crystal at its base is not).
5.8 x 4.5 x 2.5 cm. This is a broken quartz shard on one side, complete faces on the other. It had grown in tune with a thin tourmaline which later seems to have led to a split along a mid-line in the past which allowed further minute crystallization over the former break face of the quartz (front of the piece now). This thin layer of growth over the conchoidal cleavage makes the surface shimmer.
5.4 x 3.6 x 2.8 cm. From this recent find of really unusual, translucent lepidolites comes a fine miniature with the tourmaline bisecting a cluster of those neat lepidolites. The 3.5-cm-tall tourmaline stands in the middle of the joined lepidolite group. It is draped by a later generation of sparkling lepidolite crystals of smaller size. An unusual combination piece.
4.7 x 3.1 x 1.6 cm. An unusual combination piece where the lepidolite is more than just accent, because the balance of crystal to crystal is so even. The tourmaline is very gemmy and lustrous; and the lepidolite is equally lustrous, slightly translucent, and sparkling.
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Rob Lavinsky, rob@irocks.com
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share specimen![Elbaite from Cruzeiro mine, São José da Safira, Doce valley, Minas Gerais, Southeast Region, Brazil [db_pics/mdpics/MD-234886a.jpg]](db_pics/mdpics/MD-234886a.jpg)
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