Craft projects to make using Gems

A gemstone or gem is a piece of mineral, which, in cut and polished form, is used to make jewelry or other adornments. However certain rocks, or organic materials that are not minerals, are also 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 luster or other physical properties tha... From Wikipedia