The Qualities And Characteristics Of Fire Agate Gemstones
Fire agates are a variety of chalcedony, formed approximately 24-36 million years ago when they were subjected to massive volcanic action. This action forced hot water, saturated with silica and iron oxide, to repeatedly fill the cracks and bubbles in the rock surrounding the fire agates. Fire agates are known for their schiller effect, which is an iridescent play of colors that results from the interaction of light with a mineral. When looking to buy fire agate jewelry, look for gemstones with the following qualities: