Mineral Specimen and Product Inventory Search
- Availability
- Available
- Price
- $3,750.00
- Locality
- Djebel Nador, Constantine prov., Algeria
- Formula
- PbSb3+O2Cl
- Size
- 7 x 5 x 3 cm - Sm Cabinet
- Special Info
- Antique Specimen
Smoky brown, translucent crystal plates measuring 7mm on edge. This is an antique specimen once in the collection of Emile Bertrand circa 1890's. Betrand was an early pioneer in the study of optical mineralogy and introduced the "Betrand" lens to the petrology microscope. He was one of the founders of the French Mineralogy Society and went to school at the Paris School of Mines. Please see the Mineralogical Record label archive for more information (click here) .
Betrand's label along with a few other labels are shown in the provenance tab.
- Availability
- Available
- Price
- $75.00
- Locality
- 10th level, Potosi mine, Santa Eulalia, Chihuahua, Mexico
- Formula
- Fe2+Sn4+(OH)6
- Size
- 4 x 2 x 3 cm - Miniature
- Tagged
- tin
A few distorted, bright orange, octahedral crystals less than 1mm on black Ilvaite with possible Helvine and colorless Fluorite.
- Availability
- Available
- Price
- $45.00
- Locality
- 10th level, Potosi mine, Santa Eulalia, Chihuahua, Mexico
- Formula
- Fe2+Sn4+(OH)6
- Size
- 4.3 x 1.8 x 1.3 cm - Miniature
- Tagged
- tin
Several tiny, less than 0.5mm, crystals of Natanite.
- Availability
- Available
- Price
- $60.00
- Locality
- 10th level, Potosi mine, Santa Eulalia, Chihuahua, Mexico
- Formula
- Fe2+Sn4+(OH)6
- Size
- 3 x 2 x 2 cm - Thumbnail
- Tagged
- tin
Several orange to yellow tiny octahedral crystals less than 0.5mm on black Ilvaite.
- Availability
- Available
- Price
- $45.00
- Locality
- Mt. Rasvumchorr, Khibiny Massif, Kola Peninsula, Russia
- Formula
- Na2TiO(SiO4)
- Size
- 6.5 x 4.5 x 1.5 cm - Sm Cabinet
- Special Info
- Fluorescent
Greyish green crystalline Natisite, which fluoresces intense blue.
- Availability
- Available
- Price
- $25.00
- Locality
- Koktokay pegmatite field, Altay, Xinjiang, China
- Size
- 1.1 x 0.7 x 0.5 cm - Thumbnail
A few tiny grains less than 1mm in polished probe epoxy. Natrobistantite is discredited bismuth-tantalum-niobium-antimony oxide.
