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Mineral Specimens with Quartz
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5 x 4.5 x 3 cm. The color of the tsumcorite is an attractive rich orange-yellow. The tsumcorite clusters are well-isolated on contrasting matrix and have a 3-dimensionality to them. Orange-yellow aggregates to 5 mm in size. Ex. Willy Israel Collection.
12.5 x 11.4 x 6.8 cm. A huge and very rich specimen of microcrystallized yellow tsumcorite perched on small crystals of quartz. This is a large and unusually rich example for the species. Ex. Willy Israel Collection.
6.6 x 5.2 x 3.5 cm. A large and unusually rich specimen of microcrystallized orange-yellow tsumcorite perched on small crystals of quartz. Ex. Willy Israel Collection.
6.7 x 5.2 x 4.8 cm. A large and unusually rich specimen of microcrystallized orange-yellow tsumcorite perched on small crystals of quartz. Ex. Willy Israel Collection.
6.4 x 5.3 x 2.7 cm. A blue-white botryoidal coating of a crystalline matrix below. However, it looks like this could be a pseudomorph after some other mineral as there are the lumpy remnants of what might once have been crystal form here. Ex. Willy Israel Collection.
5.5 x 2.5 x 2 cm. Exceptionally sharp crystals to 1.3 cm perched on tennantite and quartz matrix. Ex. Willy Israel Collection.
9.6 x 5.6 x 3.9 cm. An unusually attractive specimen with very metallic calaverite crystals laying flat amongst rolling quartz druse, and so not etched or cleaved out of surrounding matrix as you usually see for this material. Rather, the natural matrix surface is the host for embedded calaverite crystals of unusual thick and platy form, looking more solid and robust like andorite than normal wispy calaverite! The cluster of aggregate crystals is about 1.4 x 1 cm across. Ex. Rice Northwest Museum Collection.
7.9 x 7.4 x 5.4 cm. This is a cluster of tabular crystals, nearly a complete floater, with the large anchoring crystal having its growth interrupted by a smaller crystal, then continuing to be completed in a multiple termination. Ex. Richard Hauck quartz collection.
14.4 x 8.4 x 6.9 cm. A large specimen with dozens of razor-sharp crystals of arsenopyrite on a bed of transparent quartz crystals. The arsenopyrites measure to 2 cm.
7.9 x 6.9 x 5.9 cm. This is a stunning "rose" of gemmy amethyst that is cupped in a setting of quartz crystals that have been included by hematite. The rosette stands up 3-dimensionally within this natural "base."
8.7 x 5.8 x 5.3 cm. This is a large crystal, with fine color and luster. That is a natural growth anomaly you see on one face, not damage or contact. There are two small terminations on the bottom end.
5.4 x 1.9 x 1.8 cm (largest). Four gemmy quartz crystals shot through with shimmering, golden acicular crystals of rutile, from Brazil. The crystals are clear and glassy, so the view of the rutiles is wonderful.
15.6 x 9.2 x 7.4 cm. A large combination specimen from India. On a field of sparkly grey quartz, very gemmy and bright colorless apophyllites, with a few accenting salmon-colored crystals of stilbite.
6.9 x 3.2 x 2.8 cm. A classic Brandberg quartz crystal - glassy-clear, with super luster, and internal blushes of both amethystine and smoky tones, as well as a jagged phantom crystal inside.
17.6 x 15.9 x 12.4 cm. This is a huge cast of amethyst that has replaced (pseudomorphed) euhedral crystals of fluorite, retaining their skeletal, boxy form. The largest pseudomorphed crystal here measures 10 cm! The specimen seems to have been inside a geode, as part of the outside "shell" is what forms the matrix. Inside this "shell", the pseudomorph is complete and visible from all sides.
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Rob Lavinsky, rob@irocks.com
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share specimen![Tsumcorite, Quartz from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-174090a.jpg]](db_pics/mdpics/MD-174090a.jpg)
![Tsumcorite, Quartz from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-174092a.jpg]](db_pics/mdpics/MD-174092a.jpg)
![Tsumcorite, Quartz from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-174094a.jpg]](db_pics/mdpics/MD-174094a.jpg)
![Tsumcorite, Quartz from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-174095a.jpg]](db_pics/mdpics/MD-174095a.jpg)
![Quartz (Var: Chalcedony) from Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-174157a.jpg]](db_pics/mdpics/MD-174157a.jpg)
![Tennantite, Quartz from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-174209a.jpg]](db_pics/mdpics/MD-174209a.jpg)
![Tennantite, Quartz from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-174209b.jpg]](db_pics/mdpics/MD-174209b.jpg)
![Calaverite, Quartz from Doctor Mine (Jackpot Mine), Cripple Creek District, Teller Co., Colorado, USA [db_pics/mdpics/MD-174248a.jpg]](db_pics/mdpics/MD-174248a.jpg)
![Calaverite, Quartz from Doctor Mine (Jackpot Mine), Cripple Creek District, Teller Co., Colorado, USA [db_pics/mdpics/MD-174248b.jpg]](db_pics/mdpics/MD-174248b.jpg)
![Quartz from Hot Springs, Garland Co., Arkansas, USA [db_pics/mdpics/MD-174374a.jpg]](db_pics/mdpics/MD-174374a.jpg)
![Arsenopyrite, Quartz from Yaogangxian Mine, Yizhang Co., Chenzhou Prefecture, Hunan Province, China [db_pics/mdpics/MD-174402a.jpg]](db_pics/mdpics/MD-174402a.jpg)
![Quartz (Var: Amethyst) from Artigas, Artigas Department, Uruguay [db_pics/mdpics/MD-174422a.jpg]](db_pics/mdpics/MD-174422a.jpg)
![Quartz (Var: Amethyst) from Jacksons Crossroads, Wilkes Co., Georgia, USA [db_pics/mdpics/MD-174443a.jpg]](db_pics/mdpics/MD-174443a.jpg)
![Quartz, Rutile from Ibitiara, Bahia, Northeast Region, Brazil [db_pics/mdpics/MD-174450a.jpg]](db_pics/mdpics/MD-174450a.jpg)
![Apophyllite-(KF), Stilbite-Ca, Quartz from Jalgaon District, Maharashtra, India [db_pics/mdpics/MD-174544a.jpg]](db_pics/mdpics/MD-174544a.jpg)
![Quartz (Var: Amethyst), Quartz (Var: Smoky Quartz) from Brandberg area, Brandberg District, Erongo Region, Namibia [db_pics/mdpics/MD-174548a.jpg]](db_pics/mdpics/MD-174548a.jpg)
![Quartz (Var: Amethyst) from Sidi Rahhal, El Kelaâ des Sraghna Province, Marrakech-Tensift-El Haouz Region, Morocco [db_pics/mdpics/MD-174553a.jpg]](db_pics/mdpics/MD-174553a.jpg)