gemmy LAURENTTHOMASITE (Ref: 19730)
Beravina, Ambaro, Tsaraitso, Betroka, Anosy, Madagascar
14mm x 11mm x 6mm
An exceptional gemmy crystal of extremely rare laurentthomasite from the type locality Beravina, Betroka, Madagascar. Laurentthomasite is one of the rarest gem minerals on Earth. It was found in limited number just in one locality - the type locality Beravina and pieces like this have always been scarce. The Laurentthomasite is a magnesium-potassium cyclosilicate, approved by the IMA in 2019. The mineral carries the name of its discoverer - Laurent Thomas, a well known geologist, prospector and mineral dealer, working mainly in Madagascar. This specimen comes with an original label from Laurent Thomas, written and signed by him. It displays a gorgeous dichroism: incredible, rich ocean-blue color viewed from the front and yellow-green seen from the side (with back light). The origin of dichroism lies in the presence of the transition metal ions Fe2+ and Fe3+. It displays gem areas with some internal natural imperfections. It has hardness 6 on Mohs scale. It is complete all over. In superb condition. On acrylic base., Killer – It is a chance to have such gem rarity!, From: Quebul Fine Minerals
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