Thursday, February 21, 2013

Cassiterite Montana Wood Tin

Cassiterite Montana Wood Tin
Cassiterite Montana Wood Tin

This is some Cassiterite I recovered from a placer gold deposit we had leased some years back. With a high specific gravity of about 7, these tinstones were easily recovered in our recovery system. Cassiterite is a lowgrade constituent of igneous rock and is re-concentrated in many parts of the world by alluvial dynamics.

This is a type of tinstone is commonly referred to as Wood Tin. This cassiterite is Botryoidal. You can see the precipitation rings on the upper center of my photo,  these growth rings resemble a freshly cut piece of timber hence the name Wood Tin.

Most of the major cassiterite producers are in Malaysia, Indonesia, and Thailand even England was a historical producer in the Cornwall area.

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