Bead World Gems

Sold Individually What is it: Onyx, as well as agate are both varieties of layered chalcedony that differ only in the form of the bands: agate has curved bands and onyx has parallel...

Sold Individually What is it: Amethyst is a purple variety of quartz (SiO2) where the violet color is caused by irradiation or impurities of iron which result in complex crystal...