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Cassiterite

#RW47594
SOLD
Cassiterite from Taylor Creek Tin dist., Sierra Co., New Mexico, United States - RW47594
Cassiterite from Taylor Creek Tin dist., Sierra Co., New Mexico, United States - RW47594

Cassiterite

#RW47594
Availability
Sold
Size
2.5 x 2.5 x 2 cm - Thumbnail 
Formula
SnO2 (RRUFF)
Locality
Taylor Creek Tin dist., Sierra Co., New Mexico, United States
Tagged
ore mineral , tin

There are very few if any tin mines in the USA. There are plenty of Cassiterite occurences, but this place actually produced some tin - about 1000 pounds. That's nothing in the tin world, but aside from the scarce deposits in the Black Hills, there is very little else on record in terms of viable tin mining. These deposits occured in an area roughly 450 square miles and first found as placers. The prospectors later discovered stringers in Tertiary rhyolite. 

This specimen is a one of those "nuggets", what was once termed "wood tin". Looks like hematite or goethite eh? 

Cassiterite

Formula
SnO2 
Crystal System
Tetragonal 
Crystal Habit
Prismatic, Massive, Botryoidal 
Cleavage
Perfect, Indistinct, None 
Luster
Adamantine 
Color
brown, brownish black, colorless, green, gray 
Streak
brownish white 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Irregular 
Hardness
6-7 

Data courtesy of Webmineral.

Collection
Robert Waidler Collection

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