11 of 11 Items
11 of 11 Items
Prior to 20th century, all yellow, brown and orange transparent gems were called Topaz. Modern gemology has defined Topaz as a distinct gem species, chemically and physically. In its pure form, it's colorless/white. Impurities are what cause variations in color. The most famous Topaz is actually a colorless Topaz that was first believed to be a Diamond. It's a 1,680ct stone known as the "Braganza Diamond" set in the Portuguese Crown Jewels.