What is the chemical composition to a ruby?

Answer 1

The chemical composition of ruby is aluminum oxide (Al 2 O3). Its specific gravity is 3.99 to 4.00 and refractive index range is 1.760-1.768 to 1.770-1.779. Ruby's hardness on Mohs scale is 9. It's the next hardest mineral after diamond.

Answer 2

Ruby is α-alumina (the most stable form of Al2O3) in which a small fraction of the Al3+ ions are replaced by Cr3+ ions. Each Cr3+ is surrounded octahedrally by six O2- ions.

This crystallographic arrangement strongly affects each Cr3+, resulting in light absorption in the yellow-green region of the spectrum and thus in the red color of the gem (ruby, from Latin ruber means 'red'). When yellow-green light is absorbed by Cr3+, it is re-emitted as red luminescence (the first laser light was made by ruby crystals).

Answer 3

Rubies are red gemstones that are a variation of the mineral aluminum oxide, also known as corundum. Chromium gives them their red color.

Answer 4

a variety of the mineral corundum (aluminium oxide). The common red color is caused mainly by the element chromium

Answer 5

Sapphire is made from corundum which is also known as aluminum oxide or Al2O3.

Answer 6

A Ruby is made of, Be3 Al2 Si O6

Answer 7

Aluminium Oxygen and Chromium

Answer 8

Ruby is alpha-alumina - Al2O3.