Precious stones like rough emeralds, rubies and spinels.
Semi precious stones in blue topaz ( white, sky, swiss, london) , tanzanite, tsavorite, ethiopian opals, garnet, amethyst ( africa, brazil, pink), peridot, rhodolite, citrine, multy tourmaline, iolite, agate ( green , blue , black ) , smokey quartz , aquamarine , black onyx , black spinal, precious stones, ruby, blue sapphire ( natural, diffusion ) , emerald..
