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Mineral Specimens with Quartz
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7.5 x 5.3 x 4.4 cm. A sharp, wine-red crystal of spessartine garnet (one centimeter) sits right beside a quartz crystal, on this specimen from the collection of Bill Larson. The crystals formed on the flat face of a euhedral crystal of feldspar, rather than the usual formless blob, making the specimen really attractive.
4.4 x 2.9 x 2.4 cm. From the collection of Gilbert Gauthier, a specimen of rare green quartz from Zimbabwe, which gets its pretty sea-foam green color from copper-mineral inclusions. Ex. Richard Hauck Collection.
10.9 x 4.4 x 4.2 cm. The large size, sharpness and clarity of this quartz crystal make its inclusions all that much more dramatic. Inside is a concave sheet of clay that is actually INSIDE a faintly visible double-phantom crystal. As you can see, the result is quite dramatic. There is a little bit of contact at the tip of the quartz crystal, but it is the inclusions that this specimen is all about anyway. Ex. Hauck collection.
13.0 x 4.6 x 2.0 cm. This is just a bizarre smoky quartz specimen! It is a compound crystal of tabular, elongated form, made up of dozens of sub-crystals that developed a bend from stresses in the pocket as it grew. There are little terminations on the way up, and the top is completely terminated.
23.9 x 2.2 x 2.1 cm. When does a sea creature’s home qualify as a rock? When it has been fossilized, or pseudomorphed by agate! You can see on the ends of this long branch of what used to be coral that it has been completely replaced inside by concentric rings of dense, hard agate; both ends have been polished to emphasize this.
7.0 x 5.5 x 5.5 cm. A splendent, 3.2 cm, thin tabular, hexagonal molybdenite crystal beautifully and jauntily set atop BOTH sides of the sculptural milky quartz matrix from a classic Quebec locality - Moly Hill. Classic crystal form and aesthetic composition on this fine piece.
5.4 x 4.4 x 2.7 cm. An aesthetic and showy combination specimen from the famous and now-closed Sweet Home Mine. Gemmy and lustrous, cherry-red rhodochrosite rhombs are nicely set on matrix covered with large, sharp and lustrous, dark gray tetrahedrite crystals and a scattering of needle quartz crystals. The tetrahedrites reach 1.7 cm, large for the species and locality. Tetrahedrite is a highly desirable sulfide from this famous mine. This showy piece is from the Pincushion Pocket. Henry Minot specimen.
8.9 x 6.9 x 5.9 cm. A flashy specimen from Dalnegorsk, featuring spiky, transparent quartz crystals sticking out in all directions, intergrown with lustrous, euhedral sphalerites to one centimeter.
6.8 x 5.9 x 4.6 cm. An elegant combo piece collected by Bill Hatch when he was collecting specimens at the Camp Bird Mine in the late 70s. It features poker-chip calcites to 2.3 cm (though fatter than what would usually be called poker chip crystals) on a matrix of small fluorite cubes and microcrystalline quartz.
8.4 x 6.8 x 4.2 cm. An unusual specimen for a Michigan collector, of quartz crystals on a matrix of, and with inclusions of, green chlorite. Chlorite-included quartz is common from Switzerland, Arkansas and a number of other localities, but you do not see many examples from Michigan.
7.1 x 5.1 x 3.9 cm. An unusual and pretty combo specimen from Mexico. The quartz crystals themselves are bizarre scepters that have the appearance of piled-up towers of small beta-style quartz crystals - extremely unusual form for quartz! But what makes this specimen really special is the association with microcrystals of pastel-pink rhodochrosite, uncommon from Mexico in any form.
6.2 x 4.1 x 4.0 cm. At the center of this specimen is a clear, tabular quartz crystal with a sharp phantom inside demarcated by its mossy green chlorite inclusions. Growing across its back is another quartz crystal with a sharp chlorite phantom, but of the typical prismatic form! Old California material, from the collection of noted California collector Charles Hansen.
4.2 x 2.4 x 2.4 cm. Bright pink, elongated, bladed crystals of rhodonite, always highly valued when well-crystallized - from Peru. A super miniature.
9.5 x 5.4 x 4.4 cm. A big, superb, extremely impressive specimen of sceptred smoky quartz from Nevada. Not only is it big, but the sceptering is truly dramatic, with not only the original sceptre cap, but a second, gemmy crystal that has wrapped itself around this cap! What is more, this specimen is multiply terminated on the bottom as well (the smoky, that is - not, of course, the colorless quartz crystal that the smoky originally grew around, which was attached to the pocket wall). Almost pristine, and much better in person. Collected by Ryan Bowling.
4.5 x 2.1 x 1.9 cm. A truly aesthetic mini of Vera Cruz amethyst, renowned for its clarity and delicate lavender color. These crystals are just exquisitely positioned on the sparing matrix.
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Rob Lavinsky, rob@irocks.com
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