Limestone, Calcium Oxide.
Natural ruby.
Raw baltic amber.
Black tourmaline, tourmaline.
Tanzanite.
Raw amber.
Amber stone.
Opal.
Jade.
Silica sand, river sand.
Natural dolomite and calcite limestone etc..
Amber.Manufacturing
Indonesia amber copal.
Mother of pearl.
Emerald.
Raw baltic amber.
Sleeping Beauty Turquoise.
Raw Amber.
Welo rough opal.
Amber raw.