Geology Superstore
Geology Superstore

Kyanite – Black

£6.90 ex VAT

Kyanite with a black colouration, a rare and unusual variety from Minas Gerais, Brazil, they exhibit excellent high quality radiating sheaths of accicular crystals, starting of from a single point and radiating out into many crystal and becoming wider. The mineral specimens are 3 inches in length with widths and thickness varying from sample to sample, all come supplied in a card tray with a label.

Only 18 item(s) left in stock.
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Kyanite crystal sheaths from Minas Gerais, Brazil, which show excellent accicular crystal form. Kyanite is often found in hues of blue, this black variation is rare and unusual, making such specimens highly sought after. Kyanite is a silicate mineral which is often found in pegmatites or in sedimentary rocks. However, it also occurs in metamorphic rocks, where its presence is often an indication of high pressure. The name comes from the Greek word, kyanos, which means ‘dark blue’ a reference to the rich blue colour that it is usually found in. Even more interesting is that these mineral specimens from Madagascar appear to all show excellent radiating sheath forms, while most kyanite does, the tight, clean nature of these crystals is far higher in quality. The samples are approximately 3 inches in length with the width varying but all are quite thin, they come supplied in a card tray with an information label.

Weight 190 g

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