Topaz is a silicate mineral of aluminium and fluorine. ...
Malachite is a copper carbonate hydroxide mineral. This ...
Peridot is one of the few gemstones that occur in only one ...
A large 105-carat diamond that was set in the crown of ...
Opal is a hydrated amorphous form of silica; its water ...
A bracelet that is created from layered spring bands and ...
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