are the strength of this gem

Effetto di labradorescenza nel verde

Its pleochroism is marked

This sample

5 cm and includes a chain

Rubino grezzo 17,00 ct ciuccio are the strength of thisThe gem appears included when observed with a 10x lens: presence of blue flashes caused by the treatment and other natural characteristics. 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 recrystallization and internal fractures in the ruby, but having a lower melting point than the gem, they dissolve to form a glassy