Rough & Preform


Rough minerals are found all over the globe. Different stones originate from various mineral deposits called mines. Each mine has its own unique properties.

GSC works with a variety of Rough & Preform materials such as WhiteTopaz, Sky Blue Topaz, Swiss Blue Topaz, London Blue Topaz, Garnet, Tourmaline, Citrine, Amethyst, Peridot.

Semi-Precious Stone > Rough & Preform