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9) Mineraloids
Author
Series
Pub. Date
2020.
Language
English
Description
This title covers what a mineraloid is, how it forms, and how it is set apart from minerals that have a crystalline form. It also explains how organic gems, like pearls, can also be considered mineraloids.
10) Organic gems
Author
Series
Pub. Date
2020.
Language
English
Description
This title explains what organic gems are, how and where they form in nature, and why they are set apart from inorganic gemstones.
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