ProductID: The fire agate rough that this piece was created from originated from Slaughter Mountain, Arizona, which is known for gems with intense color variations from bright reds and oranges to intense greens ,purples and blues.
Fire Agate, a variety of chalcedony, is a semi-precious natural gemstone found only in certain areas of northern Mexico and the southwestern United States. Approximately 24-36 million years ago these areas were subjected to massive volcanic activity during the Tertiary Period. The fire agates were formed during this period of volcanism when hot water, saturated with silica and iron oxide, repeatedly filled cracks and bubbles in the surrounding rock. -Wikipedia