Mineral Specimen and Product Inventory Search
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Pulaski Bauxite District, Pulaski Co., Arkansas, United States
- Formula
- AlO(OH)
- Size
- 12 x 8.5 x 7 cm - Cabinet
- Tagged
- ore specimen
Text book example of aluminum ore from the Pulaski Bauxite district with the typical texture of Bauxite, containing rounded pisolitic grains to 8mm of Gibbsite and the polymorphs Diaspore and Bohmite in shades of brown and orange-brown.
The Bauxite deposits were discovered in Arkansas in 1842 by Dr. W. Byrd Powell and mining began several decades later in 1892 when the peculiur rock was discovered to be an ore of Aluminium. The approximate Bauxite production in Arkansas from 1898 to 2009 is estimated to be 110 million long tons, valued at an estimated $1 billion. For more info see the Encyclopedia of Arkansas-Bauxite Mining page.
- Availability
- Available
- Price
- $75.00
- Featured
- Featured in Special Editions
- Locality
- Llallagua, Bolivia
- Formula
- SnO2
- Size
- 8 x 6.5 x 4 cm - Sm Cabinet
- Tagged
- ore specimen, tin
The specimen is solid Cassiterite with several pseudo-octahedral dark brown crystals to 8mm. Cassiterite is the main ore of tin and contains up to 79% tin. Historically tin was used in tinplates for tin cans and in bronze, which contained about 9% tin. Modern uses of tin include electroplating steel, bronze wire and cable, bearings and bushings, gears, and screws since it is resistant to corrosion. It is non-toxic and thus used in food-processing equipment.
Llallagua is an important producer of tin ore, with moderate temperature sulfide veins containing Bi-Pb-Ag sulfide.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- unknown mine, California, United States
- Formula
- HgS
- Size
- 7.5 x 6 x 3 cm - Sm Cabinet
- Tagged
- sulfide, ore specimen
Red fine-grained Cinnabar on a vein of Pyrite and partially coated Pyrite.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Perseverance Gold mine, Kalgoorlie-Boulder, Western Australia, Australia
- Formula
- HgTe
- Size
- 4 x 2 x 2 cm - Miniature
- Tagged
- ore specimen, tellurium
- Special Info
- EDS Confirmed
Great piece of tin-white to brilliant silver. EDS confirmed.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Keweenaw Co., Michigan, United States
- Formula
- Cu
- Size
- 11 x 8 x 7 cm - Cabinet
- Tagged
- ore specimen
Large heavy mass of native Copper in Quartz. There are no real crystals, but rather casts of Copper molded by the granular Quartz.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Poopo dist., Oruro dept., Bolivia
- Formula
- FePb3Sn4Sb2S14
- Size
- 8 x 5 x 3 cm - Sm Cabinet
- Tagged
- sulfide, ore specimen, tin
Fantastic tube-like crystals of Cylindrite, a rare tin sulfide. Excellent specimen.
