While the Feldspar mineral family is relatively common with dozens of types distributed worldwide, gem quality crystals are scarce, coveted and spectacularly beautiful, often possessing rare optical effects such as adularescence, aventurescence and iridescence. Many Feldspar gems only occur in...

For more than 4,000 years, the deep “green fire” of Emeralds has been treasured as a symbol of eternal spring and immortality. Shrouded in myth and lore, the birthstone for May isn’t just a beautiful gem: Emeralds are also ornaments of...