zircon ( synonym found)
Definition of zircon:

°A mineral occurring in tetragonal crystals, usually of a brown or grey colour and consisting of silica and zirconia.
°A crystal of zircon, sometimes used as a false gemstone.
Definition of zircon:

°A mineral occurring in tetragonal crystals, usually of a brown or grey colour and consisting of silica and zirconia.
°A crystal of zircon, sometimes used as a false gemstone.
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