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Laurentthomasite

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QBM934883

Laurentthomasite

Gem Crystal

Description Tabs

Description
Locality: 
Beravina, Ambaro, Betroka, Anosy, Madagascar
Class: 
Single Crystal
Size Range: 
Micromount (under 1cm)
Size: 
0.6 × 0.6 × 0.4 cm
Description

An exceptional gem 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. It displays a gorgeous dichroism: incredible, rich ocean-blue color viewed from the front and yellow-green seen from the side. The origin of dichroism lies in the presence of the transition metal ions Fe2+ and Fe3+. It is gem and transparent – 0.7 carat. It has hardness 6 on Mohs scale. In superb condition. On acrylic base.

Killer – it is a chance to have such gem rarity!

Shipping weight up to 0.250 kg

#19784

Mineral Data
What's on the rock

Laurentthomasite

Formula: 
Mg2K(Be2Al)Si12O30
Crystal System: 
Hexagonal
Hardness: 
6
Streak: 
Blue
Type Locality: 
Beravina, Ambaro, Tsaraitso, Betroka, Anosy, Madagascar