It is my privilege to introduce to you, World of Quartz. Quartz can also be granular, disseminated, and massive. Physical Properties Quartz has a hardness of 7 on the Mohs Hardness Scale. The specific gravity is average for a nonmetallic at 2.65. A conchoidal fracture will result when quartz is struck and it has no cleavage.
Pure quartz is usually white or colorless and the streak is white.
Impurities may contribute to an array of various colors. Quartz is transparent to translucent. The physical properties of this mineral always remain constant. The luster of quartz is vitreous and in some specimens greasy. Quartz is easily transformed from low to high quartz at 573 degrees Celsius with only minor atomic adjustments and without breaking any of the Si-O bonds.