Sterling silver, 22K gold on sterling. I wish I knew the exact name of these jasper stones but they are really cool...bands of red, deep purple/red, gray, and what appears to be hematite (which looks white in the photo...really hard to photograph these) NOTE: THESE ARE QUITE WIDE AT THE BOTTOM...1.75". 2" long on posts. PLEASE LOOK AT ALL THE IMAGES TO SEE THE SCALE. EXCHANGES ONLY.