This category is for information about gemstones and their properties.
Gemstones are generally regarded as: Polished fragments of 'precious' and 'semi-precious' minerals, used for decorative purposes.
Examples of Precious Stones:
Diamonds / Sapphires / Rubies / Emeralds
Examples of Semi-Precious Stones:
Topaz / Garnet / Spinels.
Examples of Other stones used as gems:
Jade / Agate / Opal