A gemstone or gem (also called a precious or semi-precious stone, or jewel) is a piece of attractive mineral, which—when cut and polished—is used to make jewelry or other adornments.[1] However certain rocks, (such as lapis-lazuli) and organic materials (such as amber or jet) are not minerals, but are still used for jewelry, and are therefore often considered to be gemstones as well. Most gemstones are hard, but some soft minerals are used in jewelry because of their lustre or other physical properties that have aesthetic value.
Home | About us | Contact us | FAQ | Privacy Policy | Product Tags | Sitemap | 寻找优质供应商 | Polished Gemstone RSS
Wholesale Pearl Jewelry, Silver Jewelry, Wedding Jewelry From China - Copyright © 2006 - 2010 HydiaPearl.com
