Some natural inclusions visible to the naked eye

in cui riunisco quello che ho imparato e condiviso con voi seduto nel mio laboratorio

Blue Tourmaline

the prongs had to be ramifications rather than part of a setting

che si sposta su un fondo color crema

Rubino grezzo 14,90 ct Opale Some natural inclusions visible toThe 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