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Mineral Specimens with Quartz
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10.9 x 5.4 x 4.0 cm. There are two tightly intergrown quartz crystals here, both doubly-terminated (the larger one has a healed lower termination). The top of the larger quartz is water-clear and gives a spectacular view of the golden, shimmering acicular rutile crystals inside. Chunky hematite is wrapped around the side of the two quartzes, and some hematite is also included inside the fatter quartz crystal.
7.0 x 5.2 x 3.4 cm. Russia is famous for its amethyst due to its quality. This is an old one out of the Richard Hauck Collection. It is a cluster of glowing purple crystals that grew as a knob around a chunk of matrix.
4.5 x 4.0 x 3.5 cm. Rose quartz is the most rare and desirable of the quartzes, and this is just a fine example. First of all, the crystals have formed a thin, translucent fan. More than this, they have wrapped themselves around a bizarre, transparent, flat tabular compound crystal of quartz.
7.4 x 2.9 x 2.8 cm. This is an amazing and unusual specimen from a classic Mexican locality. The quartz crystal has been completely wrapped in incredibly iridescent marcasite.
5.9 x 5.4 x 4.3 cm. From the collection of Dave Stoudt, a superb Arizona quartz specimen. The compound crystal features both smoky and amethystine hues. What makes it particularly attractive is how it sits against a backdrop of colorless quartz that serves to set it off beautifully.
7.8 x 4.9 x 4.9 cm. A fine Rift Valley amethyst showing interesting skeletal growth. The crystal has just a subtle blush of purple color in the center. It is quite transparent, so you get a good view of the growth patterns which are now encased in the center. There is even an enhydro (bubble trapped in a water pocket) that moves about an inch from one end to another of a narrow, elongated, bending pocket.
8.8 x 5.1 x 4.5 cm. This combination of a layer of translucent quartz on rounded clusters of robin’s-egg blue chrysocolla is classic from Arizona. This is the side of a pocket covered with this pretty combination. Admittedly the quartz in this case is milker than it sometimes is, so the color is not as bright as with some.
Large, lustrous, well-formed sphalerite crystals to 1.8 cm with transparent quartz crystals sticking up amongst them. Very pretty! 7.8 x 5.8 x 3.2 cm
A wonderful quartz spray on a matrix of pyrite, featuring milky crystals that taper towards the termination. Beautifully trimmed with just the right amount of matrix, and remarkably, no damage. 5 x 5 x 3.5 cm
A gorgeous, undulating light lavender chalcedony specimen, like a flower cupped in the matrix. In back, it looks for all the world as if the chalcedony has formed in a fossil shell, though I cannot swear to it. It certainly appears to be the case, with the shell forming a natural vug for the chalcedony deposition. Fluoresces bright green! 6.5 x 4.5 x 5 cm
A striking, transparent, doubly terminated quartz crystal filled with lustrous, arborescent metallic rutile needles and two attached quartz points from Diamantina, Brazil. 6.7 x 4.0 x 4.0 cm
5.3 x 4.1 x 3.8 cm. Sharp, brassy crystals of pyrrhotite are perched beautifully on clustered bursts of milky quartz crystals. You can also see some crystals of sphalerite down amongst the quartzes.
6.2 x 4.2 x 2.4 cm. A complex and pretty compound crystal of quartz from Montana combining smoky and amethystine tones; the smoky end looks very much like a Brazilian "elestial". The crystal is terminated at both ends.
7.8 x 7.8 x 4.9 cm. This is a very uncommon old Italian combination specimen from the Piedmont area. On both sides of this thin matrix are rhombs of magnesite, and opaque, tan-colored crystals of dolomite as well. Dominating the center of the specimen are slender, transparent crystals of quartz. Ex. Elling Collection.
7.9 x 2.9 x 1.9 cm. The Jonas Mine produced what is probably the most famous single pocket of tourmaline crystals of all time. This is atypical and unusual for the find and not the usual gemmy treasure, but a neat specimen nonetheless. Admittedly, this crystal has an outer rind of opaque tourmaline around and is covered with quartz crystals, but the quartz crystals actually make it rather unique and pretty. And, it is a good-sized robust crystal for the Jonas, with little columnar sub-terminations mixed with quartz crystals. Mined in 1978.
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Rob Lavinsky, rob@irocks.com
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share specimen![Rutile, Quartz, Hematite from Ibitiara, Bahia, Northeast Region, Brazil [db_pics/mdpics/MD-194076a.jpg]](db_pics/mdpics/MD-194076a.jpg)
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![Quartz, Tourmaline from Jonas Mine, Conselheiro Pena, Doce valley, Minas Gerais, Southeast Region, Brazil [db_pics/mdpics/MD-195243a.jpg]](db_pics/mdpics/MD-195243a.jpg)