Rubino grezzo 14,90 ct ciuccio Tourmaline gem variety "Cuprian": this

Tourmaline gem variety "Cuprian": this is a particular type of tourmalines that contain Copper and that owe their color to this element

Sometimes beautiful things

a Swiss topaz and a tanzanite

Beautiful pair of blue topazes with light secondary green tints

Rubino grezzo 14,90 ct ciuccio Tourmaline gem variety "Cuprian": thisThe gem appears included when observed with a 10 magnifying glass. The glassy appearance of its surface is caused by the heating treatment in the presence of fluxing materials, such as borax, in which the rough stones are immersed. These fluxes allow the recrystallization and internal fractures of the ruby, but having a lower melting point than the gem, they dissolve to form a glassy patina that remains on the surface of the rough stone and that will