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Mineral Specimens with Quartz
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12.7 x 7.7 x 7.5 cm. This is a large pocket piece of feldspar and quartz, with attached cleavelandite as well, that is 760 grams. It features a well-terminated 4.5 cm crystal in the middle of the specimen. The smoky quartz adds a very nice accent, as they sit behind the tourmaline. Ex. Saller Collection. The piece was mined some 20-30 years ago.
4.5 x 2.6 x 1.7 cm. This is a superb miniature-sized matrix gold specimen, with spectacular and complex crystallization atop the matrix. It shows several different crystal habits. Ex. Saller Collection.
29.5 x 11.9 x 6.5 cm. A magnificent specimen that is great in part simply because of its size….as long as a ruler, and with clear, sparkling quartz points to 5 cm shooting off from an unlikely extended stalk of pyrite crystals. Actually it is not a stalactite, though it looks it from the front. The pyrite covers a solid rock core, so the piece is stable despite its size and length. This was a natural stalk, or cap of a pocket extension that barely attached to the host wall, as it is crystallized around 3 sides with doubly-terminated quartzes even overhanging at one side edge. Ex. Richard Hauck Collection, obtained about 20 years ago.
11.5 x 9.8 x 6.0 cm. This is a special piece way beyond the normal quality level, one that came to me in the quartz collection of Richard Hauck (1000 pieces, all quartz). The piece features an upright stalk or stalactite, perched in a pocket whose sides are a cast of the geode it must have filled. While I believe this to be natural, and not buffed, one can never rule out that the miners did a little bit of polishing on them. Ex. Richard Hauck Collection.
A aesthetic specimen of "invisible" fluorite cubes to 9 mm preferentially perched on the side and at the base of coated quartz crystals. Very few of these have come out of Dalnegorsk in the last few years. Old specimen from the early days of dalnegorsk production, which i got from tim sherburn years ago 5.3 x 3.4 x 2.0 cm
A showy CABINET specimen of highly lustrous pale salmon-pink stilbite blades and clusters nicely set on a contrasting druze of very sparkly chlorite-included quartz from Jalgaon. Stilbite is common enough but really havent seen an association piece like this very often. The contrast in the sparkly quartz and the silky stilbite is really attractive. 14.0 x 11.3 x 6.5 cm
Lustrous and beautiful pink rhodo rhombs on sparkly, snowy-white quartz matrix from Silverton District of Colorado. Seldom on the market in this quality anymore. 6.0 x 5.0 x 3.5 cm
A very uncommon Dalnegorsk specimen of lustrous, well-developed quartz crystals included with hedenbergite and sprays and single crystals of lustrous ilvaite from the Second Sovietskiy Mine. There was a small pocket of these a few years back, than kaput. 6.5 x 5.1 x 4.0 cm
A striking, transparent and lustrous combination smoky and amethyst quartz crystal from Brandberg. The amethyst portion has a beautiful chevron pattern. SUPERB QUALITY! 6.0 x 1.8 x 1.2 cm
A excellent Michigan combination piece of a vug of bright, flattened copper crystals surrounded by quartz, epidote, prehnite and calcite from the Globe Mine. A large 1.3 cm calcite crystal is on the back. The locality is now a prison facility, so there wont be any more of these and it has value for that alone, aside from the copper! 4.6 x 3.7 x 2.1 cm
A showy combination piece of translucent and lustrous quartz crystals, preferentially coated with paper-thin calcite crystals and lustrous pyrite cubes and etched purple fluorite octohedrons aesthetically mounted at the front of the specimen. 8.8 x 6.5 x 5.5 cm
A superb, sculptural Colorado amazonite with DEEP robins-egg blue color. The crystals peak in fine terminations at various levels, giving the specimen a multi-tiered look. A couple of quartz points add a pleasing accent. 6 x 6 x 4 cm
6.5 x 5.4 x 3.0 cm. An aesthetic, old-time quartz crystal cluster from Hot Springs, Arkansas. The two water-clear, vertical, parallel-growth crystals have amazing, lavender to brown, oriented chlorite inclusions. The chlorite inclusions make this a stunning, complete-all-around and nearly pristine specimen. Chlorite-included quartz is rare from Hot Springs and this fine specimen has an around 100-year old A.E. Foote label glued to the bottom of the piece. Ex. Jaime Bird Collection and accompanied by a 1970s-era Roberts Minerals label.
2.7 x 2.0 x 1.5 cm. A fine rhodochrosite and quartz thumbnail from the American Tunnel Mine of Silverton, Colorado. A nice cluster of lustrous, rose-red, complex rhodochrosite rhombs rest on an earlier generation of pastel-pink rhodochrosite and are beautifully highlighted by a couple of water-clear quartz needles. The rose-red rhombs are peppered with either a third generation of much lighter, micro rhodochrosite rhombs or calcite rhombs. Classic material from this noted locale from the Jaime Bird Collection.
8.9 x 8.7 x 6.8 cm. A striking and aesthetic combination specimen from Irai, Brazil. Gemmy and lustrous, amber calcite scalenohedrons richly and superbly cover the amethyst "ball". The two stunning, incredibly well-placed larger calcites, up to 3.0 cm long, have these amazing, second generation, colorless calcite "caps". This is truly a unique, dramatic and beautiful Irai amethyst and calcite specimen.
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Rob Lavinsky, rob@irocks.com
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