Lizard stone 19.43 ct
Fancy Cabochon 39.85 x 19.78 x 4.38 mm
max641

Lizard stone
is a trade new name for a lemon magnesite-lizardite.
This is a new stone from China that has been tested with IR reflectance spectroscopy:
the overall spectrum shows we have a carbonate, is it calcite, magnesite, siderite? I would prefer
magnesite with siderite (they are often mixed) because the cab has a weak magnetic succeptibility, thus it
contains at least one of Fe, Mn, Ni (that is compatible with siderite and gaspeite). There are features in
the spectrum that matches the lizardite spectrum. So, it's possibly a magnesite issued from carbonation of
lizardite.( from the contribution of Thierry Cathelineau )
Untreated and polished on both side.