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Mouse Mat : Cassiterite Partly Replacing Orthoclase, Wheal Coates, St Agnes, Cornwall, England
Home Decor 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
Mouse Pad
Standard Size Mouse Pad 7.75" x 9..25". High density Neoprene w linen surface. Easy to clean, stain resistant finish. Rounded corners.
Archive quality photographic print in a durable wipe clean mouse mat with non slip backing. Works with all computer mice
Estimated Image Size (if not cropped) is 23.7cm x 17.4cm (9.3" x 6.9")
Estimated Product Size is 23.7cm x 20.2cm (9.3" x 8")
These are individually made so all sizes are approximate
Artwork printed orientated as per the preview above, with landscape (horizontal) orientation to match the source image.
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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.
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