Cassiterite ps. after Orthoclase - image 1
Cassiterite ps. after Orthoclase - image 2
specimen video

Cassiterite ps. after Orthoclase

Unknown Owner
Unusual pseudomorphs of Cassiterite after perfectly formed Orthoclase crystals were discovered at Wheal Coates near St. Agnes in Cornwall in 1828 and have become one of the most iconic Cornish classics, perhaps because they have never been repeated anywhere else. At 2.8 cm in length this one is a really great size and it has excellent shape to it too. It also has the nice feature of containing fragments, or grains of Quartz that were reported, but not often seen in these specimens. Formerly in Mike Brooke's collection of British minerals.

Product details

Species
Cassiterite, OrthoclaseAbout Cassiterite →
SizeMiniature
Dimensions1.3 x 2.8 x 0.6 cm
Added on12/02/2024
Locality
UK, England, Wheal Coates

Known provenance

DateCollectorAcquisition price
03/2026Unknown Owner$700.00
—Crystal ClassicsNot disclosed

Learn more

Cassiterite
Mineral guide
Learn about Cassiterite
mirror-like luster and dense, prismatic crystals; localities Panasqueira, Xuebaoding, Viloco; value hinges on finish, size, and matrix.
Regional guide
Cassiterite from Wheal Coates
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