Ruby
Appearance
Ruby | |
---|---|
General | |
Category | Corundum variety, Oxide mineral |
Formula (repeating unit) | aluminium oxide with chromium, Al2O3 |
Identification | |
Color | Red shades |
Luster | Vitreous |
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
[change | change source]- ↑ 1.0 1.1 1.2 1.3 "Ruby at Mindat". Mindat.org. Retrieved 23 August 2013.