Artificial Stone
A man-made, imitation or synthetic gem.
Asterism
The appearance of a rayed figure or rayed star in a gemstone, caused by the reflection of light from minute inclusions.
Artificial Stone - A gem material that is either a manmade imitation or a synthetic. (See synthetic).
Artificial stone: Manmade imitation or synthetic stone.
Assembled stone: Any stone constructed of two or more parts of gem materials, or one of gem and one of glass.
B Top ...
Artificial stones made either from crystal quartz, glass or paste that are typically designed to imitate diamonds, emeralds or rubies.
rhodochrosite ...
Cement is an artificial stone--or maybe lava.
About Geothermal Energy
Geothermal energy exploits the Earth's heat budget.
Please note that most natural gemstones, such as pearls, emeralds and rubies, contain natural inclusions and variations in color which are not seen in artificial stones.
But, due to growing demand and less supply many people in many countries are into the business of producing artificial stones. Semi precious stones and other stimulants like man-made glass are also sold in the market as the genuine diamonds.
He designed and developed the electric-arc furnace, attaining temperatures up to 3,500°C, to assist him in work which led to the production of tiny artificial stones.
Rhinestones: That the rhinestone is a stone is a crystal is a common misconception - it is an artificial stone of high lustre made of glass, paste or gem quartz.
For artificial stones show globules deep below the surface, rough patches on the surface itself, filaments, an inconsistent luster and a brightness that fails to strike the eye.
A poor thermal conductor, such as amber, feels warm to the touch because it does not conduct heat away from the body. The surface of a genuine gemstone will de-mist more rapidly than that of glass or an artificial stone.
 See also: Stone, Natural, Gemstone, Diamond, Color
  
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