- ATOMIC STRUCTURE
- CHEMICAL STRUCTURE
- SHORT BANDS are Strong e.g in Diamond
- LONG BANDS are weak as in Graphite
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DURABILITY OF GEMS MATERIALS DURABILITY is combination of three parameters. HARDNESS: Resistance to Scratching TOUGHNESS: ... -
Unit Of Weight * Gems Are Mearured In Carat * It Is Denoted By (CT) The Name Of Carat Is Derived By Carob Three. Each Can't Is Sp...
This is very educational content and written well for a change. It's nice to see that some people still understand how to write a quality post.!
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