science of gemology

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GEMSTONE - THEIR SCIENCE AND USE IN VEDIC ASTROLOGY

INTRODUCTION

What are Gemstones

Science of Gemology

How Gemstones are Formed

Legend and Mythology

History and Gemstones

Beliefs and gemstones

Science Behind Effects of Gemstones

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Science of Gemology
Gems are scientifically fascinating too. Gemmologists make a complete study of each stone, both as it is found in the rocks and after it has been cut and polished. That is why during the formal study of gemology, both aspects are given due importance. This makes them able to distinguish between two similar looking stones, one of which may be fake. The science of gemology looks at these minerals by way of their crystal structure and the physical properties. Everybody interested in buying gems (for whatever purpose) should have an idea of these properties.
o Hardness--- One of the key qualities of a gemstone is hardness. This means how well a gemstone resists scratching. Higher the hardness, more durable is the stone. Diamond is the hardest gemstone known and has been assigned hardness of 10 on Moh’s scale of hardness. The Talc has been given lowest hardness of 1 on this scale. All gemstones are rated in between 1 to 10.
o Specific Gravity--- This property shows the density of the gem. In common parlance it shows the weightiness of the gem. The greater the specific gravity, the heavier the gem will feel.
o Crystal shapes--- This can give a definite clue about the gem’s internal structure and is used by experts to differentiate between fakes and original gems.
o Optical Properties--- These properties are also used by researchers and experts to differentiate and decide about the ways of cutting and polishing the gems.
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