by Joy | Jul 17, 2009 | Crystals Gemstones Jewelry
Quartz is the most common mineral on the face of the Earth. Chemically, quartz is a compound called silicon dioxide, SiO2. As a crystal, quartz is used as a semiprecious gemstone. Quartz is a relatively hard stone, 7 on the Mohs hardness scale. Quartz is one of the...
by Joy | Feb 18, 2009 | Precious And Semi Precious Stones
Before gemologists had dissected this lustrous brown gemstone, it was known as smoky topaz. Once they dug into the chemical composition of this stone, they realized it wasn’t what it appeared to be-it was actually quartz. Topaz is a fluorine aluminum silicate...
