Let me first start with the fact that gemstones are
basically of two types when it comes to durability or their lifespan. Ruby,
Sapphires, Emerald, Hessonite and Cat’s Eye fall under the first category which
have a very long lifespan whereas Pearl and Red Coral fall under the second
category which have shorter lifespan and so they need to be replaced after some
years depending upon their quality. Starting with the first group which is a
transparent group also, as we wear these gemstones and start using them, layers
of greasy material start depositing on their surfaces due to combined action of
some oils, lubricants, greasy materials, dust and some other things that we
every now and then come in contact with.
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