Gypsum by: liceth hernandez

Color of the Gypsum- clear,colorless,gray,yellow /streak- white
The hardness of the Ggypsum is 2.5
The Luster of the Gypsum is translucent
The cleavage of the Gypsum is 2 good planes cleavage at 90 and one poor
The other Gypsum is flexible in thin sheet
Gypsum can be found throughout the world and deposits in North America run from Baja,Mexico, through Utah and from southwestern Texas to the Niagara River in New York State.
Although Gypsum is a mineral it can exist as a sedimentary rock it is a sulface containing oxgen and sulfur. Interesting Gyspum Facts : The word gypsum is derived from he Greek word gypsos which means chalk or plaseter.
Types Of Rocks Found: Sedimentary rock - is found in thick beds or layers. It forms in lagoons where ocean waters high in calcium and sulfate content can slowly evaporate and be regularly replenished with new sources of water.

Things you may know or want to know about Gypsum ........

  1. Gypsum is an evaporite mineral most commonly found in layered sedimentary deposits in association with halite, anhydrite, sulfur, calcite, and dolomite. Gypsum is very similar to Anhydrite. The chemical difference is that gypsum contains to waters and anhydrite is without water. Gypsum is the most common sulfate mineral.
  2. Gypsum uses include: Manufacture of wallboard, cement, plaster of Paris, soil conditioning, a hardening retarder in portland cement. Varieties of gypsum known as "satin spar" and "alabaster" are used for variety of ornamental purposes however their low hardness limits their durability

Types Of Gypsum

Alabaster Gypsum: Albaster a variety of gypsum from Pomaia Italy. Specimen is approximately 3 inches (7.6 centimeteres) acroos.
Gypsum from Michigan: gypsum from Grand Rapids, Michigan. Specimen is approximately 4 inches (10 centimeters) across.
Gypsum translucency: The translucent characteristic of alabaster, a variety of gypsum, from Pomaia Italy. Specimen is approximately 3 inches (7.6 Centimeters) across.
Alabster Gypsum Jar: jar made of beautiful translucent aolabaster gypsum by David MacFarlane.
Selenite Gypsum: Selenite, a variety of gypsum from penfield New York. Specimen is Approximately 2-1/2 inches (6.4 centimeters) across.
Gypsum from New York: Selenite, a variety of gypsum from Penfield New York. Specimen is approximately 2-2/2 inches (6.4 centimeters) across.
Gypsum from Virginia: Gypsum from North Holston Virginia Specimen is approximately 1-1/2 inches (3.8 centimeters) across.
Satin spar Gypsum: satin spar a fibrous variety of gypsum from Debyshire, England. Specimen is approximately 3 inchies (7.6 centimeters) across.

Sources you may use to research more about Gypsum...

More information about Gypsum

One hundred pounds of Gypsum rock contains approximately 21 pounds (or 10 quarts) of chemically combined water. Gypsum rock is mined or quarried, crushed and ground into a fine powder. In a process called Calcining the powder is heating to approximately 350 degrees F, driving off three fourths of the chemically combined water. the calcined gypsum or hemihydrate becomes the base an other gypsum products.

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