Wholesale Aventurine semi-precious gemstone beads and pendants. Aventurine is composed of two gem minerals, one is feldspar and the other is quartz. Often mistaken for jade, Green Aventurine is a granular green or blue semi-translucent to mostly opaque quartz stone. Red Aventurine feldspar is also called Sunstone or Goldstone. This gemstone varies from golden to orange to red-brown.