Surface imperfections or markings such as ridges grooves plateaus pits etching or other defects are features that can help you identify a rough gemstone. The more you know about each gemstone s natural environment as well as the color and shape variations the stone most likely possesses the easier it will be for you to spot one in nature. On close examination all natural crystals show ridges grooves plateaus pits and a number of other defects which indicate the disruptions in environmental growth conditions. Rubies sapphires are found in india sri lanka cambodia thailand madagascar tanzania pakistan afghanistan east africa australia brazil and the united states. The brown and green gems from tanzania are enstatites as are the brownish green stones from sri lanka.
Sapphires and rubies in the rough. A study of these features aids in the identification of rough gem stones. When you find a stone feel the surface to make sure it s smooth which is a sign that it s a gemstone. Some of the best ways to learn how to identify gemstones in the rough is to use a mineral crystal violet microscope to look at the inside of the stone. They can also be shiny and glasslike metallic or silky with no reflection.
Spiral growths cause low mounds or hillocks. The ability to spot them in their rough form or as part of larger rocks develops with research and time. Corundum was and still is used as an abrasive because of its hardness second only to diamond. Rough gemstones can appear dull or greasy like butter but not as shiny as glass. There are several ways to train the eye to spot such unpolished gems.
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The stone should not be malleable if it is a true gemstone. Many people think of gems as shiny beautiful pieces but this can be only attributed to the polished stones that are finely cut by jewelers. Most gem enstatites have indices in the range 1 663 1 673. When it comes to the natural raw gemstones you need a trained eye to identify them. Study the surface of the stone carefully and note any imperfections on the surface.To identify gemstones get an identification chart you can reference. Compare them to your identification chart to help determine your rough gemstone. For example rough blue sapphires from brazil look just like blue gray rocks whereas a blue sapphire from africa has angled surfaces and a bright midnight blue crystalline appearance. Semiprecious stones and rocks can be found in most geographical areas around the planet. When gemstones are struck they generate shock waves that crack the stone and cause imperfections in its composition.
When gemstones are struck they generate shock waves that crack the stone and cause imperfections in its composition. To identify gemstones get an identification chart you can reference. The stone should not be malleable if it is a true gemstone. Spiral growths cause low mounds or hillocks. Sapphires and rubies in the rough.
Semiprecious stones and rocks can be found in most geographical areas around the planet. Surface imperfections or markings such as ridges grooves plateaus pits etching or other defects are features that can help you identify a rough gemstone.
