Blue is an excellent color to pair with rubies because it’s one of the complementary colors to red, the most common color of ...
(PRESS RELEASE) The World Jewellery Confederation (CIBJO), the American Gem Trade Association (AGTA) and the International ...
rubies get their pink to blood-red hue from chromium. So [NightHawkInLight]’s recipe starts with aluminum oxide grit-blasting powder and chromium (III) oxide, a common green pigment and one of ...