genuine 4mm Ethiopian opal gemstones are set in handmade sterling silver stud earrings The opals have mostly blue and green colors. Comes with black velvet gift box Ethiopia is one of the oldest sites of human existence known to scientists today, having yielded some of humanity's oldest traces. How fitting then that it has a gemstone proven to have first been used by early mankind as a tool 160,000 years ago. The opal is a rare gemstone and has a diverse brilliance of color that encompasses the whole of the color spectrum. The Ethiopian opal is one of the most beautiful ever found. Ethiopian opal base colors include white, yellow, orange, dark red, caramel, chocolate and everything in between. The degrees of transparency range from crystal clear to opaque. er4ethopal#5