Satin Spar
In modern usage Satin Spar is a compact fibrous variety of Gypsum. It is generally white, silky and translucent with pearly or milky appearance.
Satin Spar can be cut into very striking chatoyant cabochons.
Historically, the name Satin Spar was first applied to a variety of calcite - see Calcite Satin Spar.
Satin Spar can be cut into very striking chatoyant cabochons.
Historically, the name Satin Spar was first applied to a variety of calcite - see Calcite Satin Spar.
| General Information | |
|---|---|
| A variety or type of: | Gypsum |
| Physical Properties of Satin Spar | |
| Mohs Hardness | 2, Gemstones (2009) |
| Specific Gravity | 1.52 to 1.53, Gemstones (2009) |
| Optical Properties of Satin Spar | |
| Chatoyancy | Chatoyant, Gems, Sixth edition (2006) |
| Colour | |
| Colour (General) | White, Gems, Sixth edition (2006) |
| Lustre | Silky,Pearly, Gems, Sixth edition (2006) |
| Crystallography of Satin Spar | |
| Crystal System | Monoclinic, Gemstones (2009) |
| Habit | Fibrous aggregates, Gemstones (2009) |
| Geological Environment | |
| Where found: | Occurs filling veins in rock formations with parallel fibrous crystals stretching across the vein from side to side., Gems, Sixth edition (2006) |
| Further Information | |
| Mineral information: | Satin Spar information at mindat.org |