This is a Coober Pedy opal of approximatly lozenge shape with rounded corners. It is 1.9cm long, 7mm wide in the middle and domed to about 4mm height. It weighs 2.6 carat and displays red and blue fire, the blue tunring green seen from diffenernt angles. The colours are strong under artificial light but appear more subdued in broad daylight. This stone would be suitable to set into a pendant.