Amethyst is a violet variety of quartz which has been used as a gemstone for many centuries and is a key economic resource in ...

Amethyst is a violet variety of quartz that has been used as a gemstone for many centuries and is a key economic resource in ...

Amethyst is a violet variety of quartz which has been used as a gemstone for many centuries and is a key economic resource in northern Uruguay. Geodes are hollow rock formations often with quartz ...

The three-meter tall amethyst geode - a hollow rock filled with amethyst crystals - is the main attraction at the Crystal Caves at Atherton, southwest of Cairns. But it's now missing a bit after a ...

The Gem Faire returned to the Scottish Rite Masonic Center in Sacramento on Friday for its 35th year, bringing more than 75 ...