About the Item: Each unique specimen is millions of years old and a wonderful item to give or enjoy yourself. Agates have been used for jewelry, trade, and commerce for thousands of years.
Agate, a cryptocrystalline variety of quartz, is a semi-precious gemstone. It occurs as a filling within gas cavities and veins in certain lavas or as a replacement mineral within some sedimentary limestones and claystones. Agates can form in a variety of colors depending primarily upon the presence of iron-rich solutes.