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Crystal Gallery

Available as Prints and Gift Items

Choose from 2 pictures in our Crystal collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Cassiterite Partly Replacing Orthoclase, Wheal Coates, St Agnes, Cornwall, England
Cassiterite Partly Replacing Orthoclase, Wheal Coates, St Agnes, Cornwall, England
Full Range of Prints and Gifts in Stock
Chalcocite with Quartz, Cooks Kitchen Mine, Illogan, Cornwall, England
Chalcocite with Quartz, Cooks Kitchen Mine, Illogan, Cornwall, England
Full Range of Prints and Gifts in Stock
Cassiterite Partly Replacing Orthoclase, Wheal Coates, St Agnes, Cornwall, England Featured Image

Cassiterite Partly Replacing Orthoclase, Wheal Coates, St Agnes, Cornwall, England

Twinned crystals of orthoclase feldspar partially replaced by cassiterite. This rare kind of replacement, or partial pseudomorph, is best seen in specimens from Wheal Coates, which are now world famous. The crystals were locally called "stannite" which should not be confused with the tin, copper, iron sulphide of the same name. In Cornwall, cassiterite is concentrated in hydrothermal veins and pegmatites associated with granite intrusions. Cassiterite is the primary ore of tin, the most significant metal mined in Cornwall

© RIC, photographer A.G. Tindle