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Thursday, October 16, 2008

Selenite CaSO4 2H2O Hydrous Calcium Sulfate (Gypsum). (satin spa, Desert rose)

Desert Rose
Desert RoseSatin Spa


Satin Spa



Swan Lake





Physical features
1. Color- colorless.
2. Streak- white.
3. Luster- Glassy or vitreous.
4. Cleavage- Excellent.
5. Transparency- Transparent to opaque.
6. Fracture- Conchoidal sometimes fibrous.
7. Hardness- 1.5-2.
8. Forms- Massive, flat, prismatic crystals.
There are many varieties of Gypsum, this variety is called Selenite. Gypsum is composed of calcium sulfate dihydrate. This piece of Selenite definitely has an obvious crystalline structure that is colorless. Selenite is a non-metallic mineral that can be easily scratched if not careful while holding. Never leave Gypsum in water for it will degrade itself. The mineral Gypsum is relatively common, although this variety of Selenite is less common due to its clear crystals. Selenite occurrences have been found in beds and sometimes massive in sedimentary rocks, like limestone's, shale, and clay. Gypsum is known in Russia, France and the U.S.A. (New York, Kentucky and Utah).

Citrine SiO2 Silicate Group, subgroup Quartz

Citrine with 18k gold

Physical features
1. Color- yellow to burnt orange.
2. Streak- White.
3. Luster- Vitreous.
4. Cleavage- None.
5. Transparency- Translucent to opaque.
6. Fracture- Conchoidal.
7. Hardness- 7.
8. Prismatic and terminated by rhombohedrons.
Citrine is the yellow or orange type of quartz. Natural citrine gets it's warm golden color from the element iron. Extreme heat can change the composition of the color, whether natural or man made. Most citrine has started out as amethyst then altered to get its color. Citrine is one of the fewest minerals on the earth which does not hold negative energy, it also is said to raise self-esteem and cheerfulness. Citrine is to be a stimulate for the memory and remove unwanted toxins from our bodies. Most occurrences can be found in Brazil, Spain and the U.S.A.