– introducing colored dyes into porous or fractured gems to change their color . Such fractures are sometimes purposely induced by heating the gem so that an otherwise non-porous material can more readily accept the dye .
Pearls – Dye often improves the appearance of lower – quality natural and cultured pearls by enhancing their color .
DYEING
– introducing colored dyes into porous or fractured gems to change their color . Such fractures are sometimes purposely induced by heating the gem so that an otherwise non-porous material can more readily accept the dye .
Pearls – Dye often improves the appearance of lower – quality natural and cultured pearls by enhancing their color .