Mexico, Sonora: Sonora Sunrise (or Sonora Sunset) is a rare, striking gemstone composed of vibrant red cuprite and blue-green chrysocolla, often streaked with black tenorite. Sourced primarily from the Milpillas Mine in Sonora, Mexico, this copper-oxide stone is prized for its vivid colors and, since the mine's closure in 2019, its increasing rarity. Set in a sterling silver bezel and includes an 18” silver chain. This item qualifies for free shipping!