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Devonian from Morocco Size-7cm x 5
Gerastos is a genus of proetid trilobite in the family Proetidae that lived between the Pragian and Eifelian of the Lower-middle Devonian
1cm x 2cm x 7
Natrolite From Khibiny Massif Kola Peninsula Murmanskaja Oblast RussiaSize-5cm x 2
Emerald Devonian from Morocco Size-7cm xEmerald from Brazil Size 3. 2cm x 3. 4cm x 2cm Weight 40g You will receive the item in the photo Emerald is a green gem variety of the mineral Beryl (beryllium aluminium silicate). Its deep green comes from amounts of trace amounts of chromium or vanadium. Emerald belongs to the hexagonal crystals system and the mineral class is silicate. Its hardness is 7. 5 8on the MOHs scale. Emeralds are rare because the require two incompatible elements.
