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Mineral Specimens with Quartz
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2.9 x 2.7 x 2.2 cm. This is a fine and aesthetic fluorite and smoky quartz specimen from a locality where it is almost impossible to find good fluorites. An octahedron of lustrous and translucent, lavender colored fluorite, 2.0 cm across, is jauntily perched on a smoky quartz crystal, measuring 1.5 cm across. Ex. Jeff Starr fluorite collection.
8.4 x 5.8 x 4.6 cm. Inclusions in quartz are not unusual, however in this polished fragment of quartz is a most unusual one. A euhedral crystal of splendent, bright pyrite, 2.0 cm across, is joined by two smaller pyrite inclusions in the quartz. Superb example of this rare high-quality included quartz that came out in the 1950s. Ex. Philadelphia Academy of Natural History collection.
16.0 x 12.8 x 6.4 cm. This is a superb large plate from the classic Bolivian locality. It features a matrix covered by colorless quartz, to 3.6 cm , as the host for tabular, translucent crystals of ivory-colored fluorapatite, to 4.1 cm across. The quartz crystals are peppered with sparkling, splendent sulfide crystals, which may be sphalerite. A fascinating sidebar to this specimen, is that the quartz and fluorapatite grew on two sides of the massive quartz vein. Ex. Philadelphia Academy of Natural Sciences and William Vaux Collections.
10.5 x 6 x 3 cm. This specimen is a floater, COMPLETE and terminated all around with all three of the quartzes even doubly-terminated. The bottom termination on the emerald is rough, but it’s a termination. The piece must have grown rapidly in pocket and then fallen from the matrix, while solution of emerald was still flowing through to cap off and continue growth on the once-broken termination at bottom. The top faces are sharp and lustrous, ingrown with the diagonally-attached quartzes (again, all doubly-terminated!). There are two characteristic Brumado-style magnesite crystals perched off the bottom-right hand face of the emerald. Also, there are a few 5mm, green, disc-shaped uvite crystals present (on the left , attached to the emerald; and another included inside the left tip of the upwards-pointing quartz crystal). It is not gemmy, but it is definitely green - and 4 inches tall. A very surprising, unique style for a Brumado beryl, striking because it is just so different from the norm. Weight is 123 grams.
5.5 x 3 x 2.5 cm. A very unusual and wonderfully aesthetic combo specimen that features gem fluorites in association with a cluster of razor-sharp scheelites – with little snowy calcite rhombs and a euhedral quartz crystal forming the backdrop!
8.3 x 8.3 x 6.2 cm. This specimen is a great small cabinet size piece consisting of super quality, sharp, gemmy, lustrous, prismatic, light purple color "reverse" scepter and simple prisms of Amethyst measuring up to 1.3 cm sitting atop white/colorless, modified scalenohedra of Calcite on matrix. This piece is remarkable for Bolivia as it is from an "Alpine-type" locality (non-ore body), and features a type of crystallization that is rarely seen from Bolivia.
5.9 x 3.4 x 3.3 cm. A perfect mini of the so-called "milky" quartz characteristic of the classic Ouray locality - with a single large crystal accented by a patch of smaller ones, all terminated. An old-timer, ex. Carlton Davis Collection.
5.8 x 3.4 x 2.6 cm. A fine old New Hampshire smoky, ex. Carlton Davis and Scott Williams collections. It is in fine condition, except for some barely visible micro edge wear.
7.4 x 4.9 x 2.9 cm. An aesthetic Dal’negorsk combo specimen, of two common minerals that appear here in an uncommonly pretty form - two crossed quartz crystals, the vertical one of which is framed by the terminations of a spray of flashy calcite crystals that grew to surround the termination of the quartz.
5.9 x 4.3 x 2.9 cm. This appears at first glance to be Chinese, but no, it is a much rarer, superb specimen of purple fluorite from the San Antonia Mine (out of the Marty Zinn Collection). The fluorites and associated quartz crystals completely surrounded the sparing matrix, so all you see is this glorious burst of color and sharp crystals, with an extremely aesthetic overall form. The fluorites measure up to around one centimeter across.
6.8 x 6.6 x 5.8 cm. A pocket curving around a knob of matrix, filled with balls of blue-green chrysocolla with a sparkly covering of drusy quartz -- on a field of dove-grey drusy quartz that creates a dramatic setting for the chrysocolla! Ex. Marty Zinn Collection.
6.5 x 5.2 x 3.6 cm. Prince of Wales Island is perhaps the world’s most famous epidote locality. But while it has turned out specimens in fairly good numbers, despite the horrid collecting conditions, this one really stands out. Why? It is the association with beautiful light mint green, chlorite-included quartz crystals. Both these and the epidotes are isolated on the matrix. Most Prince of Wales epidotes are simple standalone clusters of crystals, so this one has a really "different" and pretty look. For scale, the largest epidote has about 2.5 cm of the crystal showing.
15.9 x 12.4 x 6.4 cm. This is a spectacular showpiece of stalactitic amethyst from Uruguay. As you can see, the stalactitic "fingers" are all complete, which is most uncommon.
6.5 x 5.5 x 4.7 cm. STRIKING iron oxide-stained, Japan-law twinned quartz crystals abound on this showy, old-time specimen from an UNCOMMON New Mexico locality, the San Pedro Mine. This is a RARE occurrence for this locality. Ex. Richard Hauck Quartz Collection.
6.2 x 4.9 x 4.4 cm. A 2.5 cm cluster of lustrous, radiating blades of semseyite, "protected" by two, large, frosted, colorless quartz crystals to 5.0 cm and nestled amongst smaller quartz crystals.
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Rob Lavinsky, rob@irocks.com
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share specimen![Fluorite, Quartz (Var: Smoky Quartz) from Mt Antero, Chaffee Co., Colorado, USA [db_pics/mdpics/MD-171922a.jpg]](db_pics/mdpics/MD-171922a.jpg)
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![Chrysocolla, Quartz from Manto Tres Gracias Mine, Diego de Almagro, El Salado, Chañaral Province, Atacama Region, Chile [db_pics/mdpics/MD-172357a.jpg]](db_pics/mdpics/MD-172357a.jpg)
![Epidote, Quartz, Chlorite Group from Green Monster Mountain, Prince of Wales Island, Prince of Wales-Outer Ketchikan Borough, Alaska, USA [db_pics/mdpics/MD-172370a.jpg]](db_pics/mdpics/MD-172370a.jpg)
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![Quartz from San Pedro Mine, New Placers District, Santa Fe Co., New Mexico, USA [db_pics/mdpics/MD-172397a.jpg]](db_pics/mdpics/MD-172397a.jpg)
![Semseyite, Quartz from Herja Mine (Kisbánya), Baia Mare (Nagybánya), Maramures Co., Romania [db_pics/mdpics/MD-172401a.jpg]](db_pics/mdpics/MD-172401a.jpg)
![Semseyite, Quartz from Herja Mine (Kisbánya), Baia Mare (Nagybánya), Maramures Co., Romania [db_pics/mdpics/MD-172401b.jpg]](db_pics/mdpics/MD-172401b.jpg)