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Types of gemstones[change | edit source]
Other websites[change | edit source]
- "Book of Royal Gemstones" is a book from 1554 that talks about gemstones.
- "The Blossoms of Thoughts Regarding the Precious Stones" is an old book from the 1600's that is considered one of the most important books about precious stones. It is written in the Arabic language.
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