Ruby

For other uses, see Ruby (disambiguation).
Ruby
A ruby gemstone
General
CategoryCorundum variety, Oxide mineral
Formula
(repeating unit)		aluminium oxide with chromium, Al2O3
Identification
ColorRed shades
LusterVitreous
References[1]

A ruby is a kind of precious stone. It is often associated with emerald, sapphire and topaz.[1] It is usually red, but can sometimes be other colors.[1] It is formed of aluminum and oxygen (Al2O3),[1] and that means it's a kind of corundum. A small amount of chromium makes the color. They are the most popular red gemstone, and is aften linked with the birthmonth of July.

References

  1. ↑ 1.0 1.1 1.2 1.3 "Ruby at Mindat". Mindat.org. Retrieved 23 August 2013.


This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.