Posted by: Maia Sinkins on 08.06.2020 | Filed under:


Specimen # 100364
Mineral: Datolite
Location: Charcas, Mun. de Charcas, San Luis Potosí, Mexico
Size: 7.1 x 5.7 x 2.2 cm


Group of good-sized datolite crystals, the largest of which measures 2.8 cm. Some of the crystal faces have a brilliant glassy lustre and others have a silky finish (not matte or dull). The crystals have some very cool selective coating on certain faces, but it is not on the surface, it is underneath a “top-coat” of the silk-lustred datolite. (I have seen others with selective coating from this find where the coating gives a chalky surface with no lustre.) Internally the colour of the datolite crystals ranges from yellowy-green to a pale ice blue. No damage, incomplete crystals around the periphery where this was attached. This is a beautiful and very distinctive datolite specimen.

Additional information

Dimensions 15 × 10 × 8 cm