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Mineral Specimens with Quartz
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6.5 x 4.5 x 3.4 cm. A very aesthetic and elegant specimen of frosted, colorless quartz crystals beautifully highlighted by two large Japan-law twin crystals. The flattened-twins, with distinctive, beveled edges, rest in a nest of normally terminated quartz crystals. This is a complete-all-around specimen and very interestingly, the backsides of the twins are not frosted and are silky smooth. Ex. Dave Stoudt Collection and according to their catalogue and label, it was purchased at Tucson in 1998.
7.7 x 6.5 x 4.2 cm. This specimen, probably from the old Christy location at Magnet Cove, features a quartz rich vug, with colorless quartz crystals, to 1.5 cm in length, upon which are perched two equant, black brookite crystals, with astonishing luster. The brookite crystals measure 1.2 cm across. Ex. Richard Hauck Collection.
This is a cluster of deep green epidote crystals to 1.8 cm that have grown on a quartz point, having passed through two notable collections (Marion Godshaw and Tim Sherburn) . A very intricate and pretty locality specimen! 3.6 x 3.3 x 2.3 cm
3 x 1.9 x 1.4 cm. This clear, doubly-terminated quartz encloses a 2.2 cm doubly-terminated brookite crystal that is floating in perfect alignment to the axis of the quartz, as if it grew around the brookite as a seed. Small acicular rutile crystals shoot off the brookite, as well.
3.8 x 2.9 x 1.4 cm. A striking, lustrous, doubly-terminated anatase of superior quality perched upon a quartz point. Ex. Laura and Stevia Thompson Collection.
A superb Russian axinite from Dalnegorsk where they are much more uncommon than from the other Russian locality of Puiva, with razor-sharp crystals to 2.75 cm, showing glassy luster and virtually no damage. They are accented with gemmy little tabular datolites and bright quartz crystals. Complete display face and trimmed nicely, though saw marks remain on the backside. A difficult specimen to shoot, much better in person! 10 x 5.3 x 5.1 cm
This is absolute TOPS for sheer aesthetic quality for this material because it has large sharp crystals well-isolated on matrix . The crystals are just perfect, with a gorgeous purple-green translucency, and are perfectly balanced on the contrasting white matrix. The specimen is crowned with a superb crystal of over 3 cm on edge that “tops it off” perfectly . These are best shown in sunlight or with backlighting coming through from behind, or they do look dark; but when displayed properly are really neat fluorites. New finds! 13 x 10.5 x 5 cm
INCREDIBLY gemmy spessartines, like little jewels, are sprinkled and isolated all across this matrix, which itself is really attractive in that it is made up of euhedral crystals of light olive-green feldspar! Little smokies here and there add an attractive accent. The spessartines are not large (measuring to 0.3 cm), but are just so fine and bright. They have formed right on top of the feldspar crystals, including a large, textbook one, and are climbing up the sides of many of the smokies. 11.0 x 8.5 x 4.3 cm
A superb mini from the exciting recent finds in Las Vigas, from which specimens are just now leaking out. This one, along others we have been offering) was cherry-picked at the source from amongst several hundred. They crystals are super-clear and have the fine purple blush that makes this such a famous amethyst locality. 3.4 x 3.2 x 2.1 cm
13.1 x 6.9 x 6.5 cm. Panasquiera is a classic locale for apatite and these gemmy purple, hexagonal crystals exemplify why this has always been the case. The mine is now defunct. This cabinet sized specimen is nice because it features superb, gemmy apatites (to 2 cm) perched on an unusually pristine, and very impressive, quartz cluster. Weighs 490 grams.
5.0 x 1.1 x 1.0 cm. A beautiful pair of gemmy, blue-green, thin, prismatic Vivianite crystals measuring up to 8 mm sits atop a gem quality, hexagonal Quartz crystal from this classic locality. Chicote Grande is one of the "forgotten" mines in Bolivia over the last 20 years as very little material has been available in recently, but in its day, this locality provided collectors with some very attractive display specimens. A good Vivianite from this well known Bolivian mine.
3.5 x 2.3 x 2.2 cm. Monazite gets its name from the Greek word "monazein", which means "to be alone", in allusion to its isolated crystals and their rarity when first found. Monazite is usually found in granitic pegmatites, but these crystals are found in hydrothermal tin veins where is an absolute absence of Thorium (usually a trace element in Monazite). This is a remarkable, very well crystallized, ridiculously rare, specimen consisting of sharp, lustrous, translucent, orange-pink, twinned crystals on Monazite-(Ce) measuring up to 7 mm on Quartz crystals on matrix. The crystals actually perform a color change in different lighting ranging from orange-pink to a white/yellow depending upon the light source. This piece is from the same mine for which this material was discovered along the Contacto and San Jose veins in this mine and was first described by Sam Gordon and Mark Bandy.
7.3 x 5.0 x 1.5 cm. This fine specimen was found about 5-6 months ago (2009). Bolivia has probably produced more tin than any other country in the world. The great tin mines at Viloco (sometimes called Araca) have produced some of the most magnificent Cassiterite specimens extant. This particular specimen host of several fine, sharp, highly lustrous, black-brown cyclic twinned crystals measuring up to 1.4 cm across which are associated with beautiful Quartz crystals that actually have small Smoky Quartz "phantoms" in the center of the prisms. The Cassiterite/Quartz/Smoky Quartz association is uncommon and beautiful.
2.1 x 2.0 x 0.9 cm. The Sweet Home mine is famous for its Rhodochrosite specimens, and Richard Kosnar mined the Sweet Home for a few years during the late 1970's and managed to collect some excellent Rhodochrosite specimens. It features a few sharp, translucent, reddish-pink Rhodochrosite rhombohedra perched atop white "needle" Quartz and associated with minor sulfides. The final touch to this specimen is a small, sharp, gem quality dodecahedron of lavender Fluorite at the base. This piece is from one of the early pockets that Rich Kosnar opened when he started mining in 1977. Ex. Richard Kosnar Collection.
2.7 x 1.2 x 1.1 cm. A really interesting and elegant Arizona sceptered quartz thumbnail. A water-clear, gem-like, quartz crystal is beautifully perched on a six-sided quartz crystal column. Ex. Sam Nasser Collection.
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Rob Lavinsky, rob@irocks.com
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