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Quadrillion cut
A square-cut of stone that is also known as a Princess
or Squarllion cut.
Quartz
A crystalline mineral that is found in
many forms. There are many Quartz like amethyst, aventurine, citrine, opal, rock
crystal, tiger’s eye, rose quartz and many others. Quartz has a
hardness of 7.0.
Quinzite Opal
Also known as Quincite, quincite opal, and rose opal it is red to
pink type of opal.
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