This article relies largely or entirely upon a single source. (January 2019)
A garnet // is one kind of silicate mineral. There are many different kinds of garnets, containing different metals. Crystals of garnet are often large and pretty. Their most common color is red or purple, but they can be found in almost all colors and are often used in jewelry. In the United States, garnet is the birthstone for people born in the month of January.
|The general formula X3Y2(SiO4)3|
|Color||virtually all colors, blue very rare|
|Crystal habit||Rhombic dodecahedron or cubic|
|Fracture||conchoidal to uneven|
|Mohs scale hardness||6.5–7.5|
|Luster||vitreous to resinous|
|Polish luster||vitreous to subadamantine|
|Optical properties||Single refractive, often anomalous double refractive|
|Other characteristics||variable magnetic attraction|
|Wikimedia Commons has media related to Ugrandite.|
- http://www.gemstonemagnetism.com contains a comprehensive section about garnets and garnet magnetism.
- USGS Garnet locations – USA
- Blog post on garnets on the Law Library of Congress's blog