It is the lime cliff of recrystallization, lime cliff issues molten in high temperature high pressure, when what containing mineral happening to change, new crystallization forms marble. Bases is calcium and dolomite, color is very much, have apparent figure normally, mineral grain is very much. Rub family name hardness is in 2.5 to 5 between.
Marble cent is 3 kinds:
Dolomite: Magnesite (calcium carbonate is magnesian) content 40% above
Magnesian olivine: Magnesite (calcium carbonate is magnesian) content is in 5% to 40% between.
Calcite: Magnesite (calcium carbonate is magnesian) content is little at 5%
2. Slabstone:
By clay cliff, deposit shale (sometimes by stone stone) the degenerative cliff that form, mineral grain is imperceptible, thin and brittle, it is black, ash or green normally.
3. Serpentine
Because of its decorative pattern is like snakeskin and get a name, the commonnest color is mixed for green Brown. Rub family name hardness is in 2.5 to 4 between. Contain many magnesium, result from igneous rock. Recrystallization action and diamond polish effect sometimes not beautiful.
3, igneous rock
Igneous rock basically is formed by volcanic material, be like magma. The liquid magma below the earth's surface is cooling, caky. Mineral gas is formed with liquid infiltration rock new crystallization and all sorts of color. String 2
Granite:
Main by quartz (35% ) , feldspathic (45% ) form with potassium, it is deep color commonly. Calcite
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