Gypsum is one of the more common minerals in sedimentary environments. It is a major rock forming mineral that produces massive beds, usually from precipitation out of highly saline waters. Since it forms easily from saline water, gypsum can have many inclusions of other minerals and even trapped bubbles of air and water.
Gypsum has many interesting properties, including its very unique crystal habits. Many Gypsum crystals are found perfectly intact without distortions or parts broke off.Such crystals are found in clay beds as floater crystals, where they fully form without being attached to a matrix. Gypsum crystals are known for their flexibility, and slim crystals can be slightly bent.Gypsum crystals are Familiar for their flexibility, and slim crystals can be slightly bent.
Inasmuch it forms easily from saline water, so gypsum can have many inclusions of other minerals and even trapped bubbles of air and water.
CRYSTAL GYPSUM TYPES
Gypsum Has Several Variety Names That Are Widely Used In The Mineral Trade.
SATIN SPAR: Satin spar selenite is the fibrous variety of Selenite. It is generally white, silky and translucent with pearly or milky appearance. Satin Spar Selenite can be cut into very striking chatoyant cabochons. Historically, the name Satin Spar was first applied to a variety of calcite.
SELENITE: Selenite is a transparent, colourless variety of Gypsum. Selenite is named after Greek word for the Moon, referring to the moonlight effect from cleavage surfaces. Selenite is a variety of Gypsum that occurs in transparent crystals or crystalline masses.It is often colorless with a vitreous or pearly luster.
DIFFERENT BETWEEN SATIN SPAR AND SELENITE
- Selenite has cleavage.
- Satin Spar is usually cheaper than Selenite.
- Satin Spar is fibrous, Selenite is no fibrous.
- Satin Spar is milky white/opaque, Selenite is transparent.
CRYSTAL GYPSUM DIFFERENT USES AND ANALYSIS
Crystal gypsum can be found with different usage such as: