Cronstedtite with Cacoxenite on Quartz - image 1

Cronstedtite with Cacoxenite on Quartz

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This small thumbnail from Wheal Jane, close to Truro in Cornwall, comprises of a single greyish, terminated Quartz crystal, one side of which is covered with 1 to 3 mm black Cronstedtite crystals dusted with micro-spherules of apricot-tan Cacoxenite. Please note this is a small specimen and could be considered a micromount. Using a lens and scale, I roughly measure the Cacoxenite spheres at about 0.1 mm diameter (yes, mm, not cm). Cronstedtite is a complex iron silicate and Cacoxenite an iron aluminium phosphate. Both species are well known from Wheal Jane but are uncommon.

Product details

SizeThumbnail
Dimensions1.7 x 1.8 x 1.0 cm
Added on12/02/2024
Current owner
Unknown Owner
Previous owners
DateCollectorAcquisition price
—Crystal ClassicsNot disclosed

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Quartz
Mineral guide
Learn about Quartz
a versatile mineral with clear, milky, and colored varieties; crystal forms, formation clues, and tips for identifying amethyst and citrine.
Quartz
Regional guide
Quartz from Wheal Jane
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Locality guide
Wheal Jane
Wheal Jane, UK — premier modern Cornish locality yielding ludlamite, cronstedtite, sphalerite and quartz pockets; type locality for ludlamite, prized by collec…