The product is a 1-piece Ethiopian Fire Black Opal rough crystal, polished and in tumbled shape. It is a natural healing stone originating from Ethiopia. The approximate product size is 6mm to 12mm, and it weighs between 1 to 2 carats. Known for its shimmering rainbow of colors, Ethiopian Fire Black Opal is believed to have powerful healing properties, making it a popular choice among crystal collectors and enthusiasts.