Chalcedony is a catch all term that includes many well known varieties of cryptocrystalline quartz gemstones. They are found in all 50 States, in many colors and color combinations, and in sedimentary,...
CITRINE (lemon stone), the yellow and orange variety of quartz VARIETY INFORMATION:VARIETY OF: Quartz , SiO 2 . USES: Gemstone and ornamental stone. BIRTHSTONE FOR: November COLOR: various shades of...
What is Labradorite,Sunstone,Amazonite ================================================================================================= Background on Feldspar Gemstones: The name "feldspar" comes from...