A Geoscience Digital Image Library

TitleRuby (corundum) from Mysore, India
DescriptionRuby is the red gemmy variety of corundum, Al2O3, one of the hardest minerals known. Gem corundum of any other color is called sapphire (although we generally think of sapphire as being blue). The red color in ruby is caused by trace amounts of chromium. The best shade of red for ruby is often given the name “pigeon blood red,” but ruby can be any shade of red to almost pink. This crystal is about 7 cm across.
LocationUSA ▹ India. Near Mysore.
PhotographerDarla Sondrol. 2001-07-03.
CollectionUniversity of North Dakota Mineralogy Collection.
Key wordsruby, corundum, India
Tech details605 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number1026