|CASSITERITE MINERAL FACTS|
|The Gem and Mineral Collector's Photo Gallery by Nevada Outback|
Cassiterite Mineral Facts:
Chemical Formula: SnO2
Normally Brownish red to black
Cleavage: Imperfect cleavage parallel to P(100) and P(111). Fracture Subconchoidal, or uneven; brittle.
Luster:. Adamantine luster on crystals, usually very brilliant. . Transparent to translucent.
Optics: (Refractive Index): w= 3.0877, e= 2.7924
Cassiterite occurs in hydrothermal veins, associated with acid rocks, granites, as in Cornwall. The main occurrence of cassiterite is in quartz veins, associated with fluorite, topaz, tourmaline, axinite, and apatite, as in Cornwall, Saxony, and Bolivia.Tin veins are usually rich in boron or fluorine, and contain minerals like tourmaline, topaz, fluorite and apatite. Wood Tin is a variety of cassiterite, in which the structure is compact and fibrous internally, exhibiting concentric bands, which cause it somewhat to resemble wood; it occurs in reniform masses.
Identification and Diagnostics
Localities and Origins:
Localities of alluvial tin deposits are Malaysia; Bolivia; Indonesia, Russia; Cornwall; Mount Bischoff, in Tasmania, Thailand, China, etc. Massive tinstone and stream tin occur in large enough quantities to be mined in Cornwall, England; on the Malaysian Peninsula and on the islands lying off its extremity; in Tasmania; in New South Wales, Victoria and Queensland, Australia; in the gold regions of Bolivia; at Durango in Mexico, and at various points in Alaska, at some of which there are 400 lb. of cassiterite in a cubic yard of gravel.
Use. Cassiterite is the only important ore of tin. Tin is also used in various alloys: solder, containing tin and lead; bell-metal and bronze, containing copper and tin.
Return to the Mineral Collectors Information Page
Please note that the author, Chris Ralph, retains all copyrights to this entire document and it may not be reproduced, quoted or copied without permission.
NEVADA OUTBACK GEMS TURQUOISE AND JEWELRY
Nevada Outback Gems
|Find out more by checking out All of our links below:|
|View our Contemporary Turquoise Jewelry - Wearable Artwork!||View our Unique Gem Quality Turquoise Cabochons|
|Premium Jewelry, with Gemstones of all types||Top Quality Loose Gemstones - Gemstones of all types|
|Rare Crystals and Gemstone Rough, all types||Our Free Colored Gemstone Information Encyclopedia|
|Chris' Gold Prospecting Encyclopedia||Take a virtual tour of our Nevada Turquoise mines|
|Miners Reference Pages||California Gold Rush Stories||More Info about Turquoise, the Beautiful Gem|
|Metal Detecting with the MXT Metal Detector||Nevada Outback Gems Homepage|
|Build Your Own Mining Equipment||Investing in Gold and Precious Metals|
|Basic Placer Mining||More information about us - Nevada Outback Gems|
|Locations to Prospect for Gold||The Rockhound's Corner||Nevada Outback Library and Bookstore - Learn more!|
|Chris's Prospecting Adventures||About Nevada Turquoise||More Info about Gem Cutting||Tanzanite Jewelry|
|Nevada Outback Gems Site Map||Make Your Own Jewelry||Buy Safely on EBay: avoid fraud and scam artists|