Costume

Costume

Paste Used to Simulate Yellow Natural Gemstones in Costume Jewelry. Costume Costume jewelry is jewelry made from less costly materials such as plastics or wood and also inexpensive metals such as aluminum and copper. The stones used in this type of fashionable jewelry...
Cubic Zirconia

Cubic Zirconia

Cubic Zirconia Round Brilliant-Cut Cubic Zirconia. Cubic zirconia is a man-made material used to imitate diamond and other gemstones, commonly referred to as CZ. Cubic Zirconia has a thermal insulating property while diamond is a very efficient thermal conductor. It...
Czochralski

Czochralski

Czochralski Synthetic Ruby, Czochralski Boule. The Czochralski method, developed by Polish scientist Jan Czochralski, was a byproduct of his investigation into the crystallization rates of metal. He accidentally dipped his pen into molten tin, instead of his inkwell,...

Dyeing

Dyeing The dyeing or staining of gemstones is one of the oldest gem treatments. Somewhat porous gemstones, such as polycrystalline varieties, allow pigments to penetrate the material to a certain extent. Monocrystalline gemstones can be coated with a dye or colored by...