Rubies are formed of a mineral called corundum, comprised of aluminum oxide. The red color is caused by traces of chromium. Corundum also forms sapphire in many colors, which generally come from ...
The Artstor website will be retired on Aug 1st. The Journal of the Royal Asiatic Society... The Journal of the Royal Asiatic Society of Great Britain and Ireland Vol. 7, No. 2, 1843 Mineral Resources ...
Hosted on MSN1mon
The Mysterious Origins of Sapphires Have Finally Been DecipheredNow, sapphires are predominantly made up of aluminum oxide in the form of corundum, but other elements can become mixed in. The deep blue hue that sapphires are known for comes from titanium and ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback