(earlier answer:) It is a cross section slice of a stalactic quartz growth. A quartz stalactite sliced into discs.
150805: PMH: I haven't seen one (online) that's not all garish colors - and I think those colors have to be artificial - dye, probably.
Quartz
sandpaper, optics, glass, liquid filters, circuit boards, computer components, cement , mortar, and jewelry.
You can make countertops and jewelry.
One can purchase a quartz watch in a variety of jewelry stores. One can visit Macy's, Dillard's as well as Shane Co. All of which have an outstanding jewelry department,
Smokey quartz is a beautiful of yellowish brown. When set in rings, necklaces or earrings the smokey quartz makes quite a statement. It is a very popular stone for medium priced jewelry.
Quartz
Quartz is a crystal. It is the most common mineral found on Earth and is commonly used in making watches and jewelry.
sandpaper, optics, glass, liquid filters, circuit boards, computer components, cement , mortar, and jewelry.
Yes
Quartz is the second-most-abundant mineral in the Earth's continental crust, Throughout the world, varieties of quartz have been since antiquity the most commonly used minerals in the making of jewelry and hardstone carvings.
rose quarts is most commonly used in jewelry and is usually carved into hearts.
Quartz is used in the making of sandpaper, optics, glass, liquid filters, circuit boards, computer components, cement , mortar, and jewelry. Quartz crystals are also piezoelectric meaning when an electrical current passes through them they vibrate a small amount. Time can be measured from the vibrations of the quartz crystals so quartz crystals are often used in clocks.
Jewelry. Smokey Quartz deep, rich brown color can accent any skin tone and is very easy to match with outfits.
You can make countertops and jewelry.
*volcanic rocks*jewelry*mountains
The same way any stone is cut, Herkimer diamonds are not diamonds, its a type of quartz.
Quartz because it is harder, more durable and more resistant to scratching than calcite.