Home > Europe > United Kingdom > England > Cornwall > St Agnes
Cassiterite Partly Replacing Orthoclase, Wheal Coates, St Agnes, Cornwall, England
Wall Art and Photo Gifts from Royal Cornwall Museum
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
Royal Cornwall Museum is the UK's Greatest Museum For Cornish Life & Culture
TRURI : 801.787
Media ID 18814416
© RIC, photographer A.G. Tindle
Black Dark English Geology Grey Light Metal Metallic Mine Mineral Mining Orange Oxide Specimen Carlsbad Crystal Feldspar Twinning Twins
FEATURES IN THESE COLLECTIONS
> Arts
> Photographers
> Europe
> United Kingdom
> England
> Cornwall
> St Agnes
> Royal Cornwall Museum
> Museum Objects
> Minerals
EDITORS COMMENTS
This print showcases a remarkable geological phenomenon found in Wheal Coates, St Agnes, Cornwall, England. The image captures twinned crystals of orthoclase feldspar that have undergone a fascinating transformation - partial replacement by cassiterite. This rare type of replacement, known as a partial pseudomorph, is best observed in specimens from this renowned location. Local miners referred to these transformed crystals as "stannite" although it is important not to confuse them with the tin, copper, iron sulphide bearing the same name. Cassiterite primarily occurs in hydrothermal veins and pegmatites associated with granite intrusions within Cornwall's mineral-rich landscape. Cassiterite holds immense significance as it serves as the primary ore for tin mining - an industry that has played a pivotal role in Cornwall's history. With its metallic luster ranging from light grey to dark black or even orange hues, this crystal specimen beautifully exhibits the unique characteristics of cassiterite. Photographed by Andy Tindle and preserved at the Royal Cornwall Museum, this print offers viewers an opportunity to marvel at nature's intricate processes and appreciate the geological wonders present beneath our feet.
MADE IN THE USA
Safe Shipping with 30 Day Money Back Guarantee
FREE PERSONALISATION*
We are proud to offer a range of customisation features including Personalised Captions, Color Filters and Picture Zoom Tools
SECURE PAYMENTS
We happily accept a wide range of payment options so you can pay for the things you need in the way that is most convenient for you
* Options may vary by product and licensing agreement. Zoomed Pictures can be adjusted in the Cart.
