· Since certain types of quartz are considered semiprecious gemstones, they are often used in jewelry and stone carving. When quartz is ground up into quartz sands, they are used in the production of glass, fiberglass and as an abrasive in stonecutting and sandblasting. Pure, fine quartz sands are also used in water purifiion systems. Small chips of quartz are .
Sagenite. Sagenite is a stone that is made up of a mixture of Rutile in quartz and/or in agate, and often also contains other minerals such as actinolite, chlorite, goethite or manganese. Sagenite Pendant. The inclusions can occur in a fan shape or simply floating loosely in the matrix stone.