Hummingbird Stone 
Mixed metals, Mexican fire opal teardrop in a fine and sterling silver setting with bead wire accent.  
18" sterling silver Italian diamond cut rope chain  
Fire opal was born in the ancient volcano flows of Mexico. They were formed during the Cretaceous period and brought to the Earth’s surface during the Pleistocene age. The Aztec Indians of Mexico were among the first to discover the opal of many colors. They called it the Hummingbird stone, or vitzitziltecpal, named for how the colors in the opal were iridescent like hummingbird’s plumage. According to historic dates, Mexican opals were used by the Aztec people for ornamental and ceremonial pieces between the years 1200 CE and 1519 CE.