Laurentthomasite is a newly found mineral in Madagascar.

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Laurentthomasite is a mineral that was recently approved by the International Minerals Association (IMA) in 2019. It's appealing not only as a newly discovered mineral, but also as an excellent translucent and attractively coloured gemstone. We might be able to test some samples in the coming days. I'd like to share our calculated 
property with you.

rare mineral found in maddagascar
The basic gemmological property
　Theoretically is R.I. is 1.540-1.545 (uniaxial +) but our tested samples showed 1.555-1.560 (uniaxial +). The S.G is about 2.67. The crystal system is hexagonal. And it shows strong pleochroism as blue and yellow.
The hardness is about 6.

close-up of rare mineral found in madagascar
Laurentthomasite

     Laurentthomasite 



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