Looking at the back you can see this is a double nut (twins?) merged together with a sliver of opal down the centre. On the front it looks like one nut with sparkling green opal, with a few sparkles of blue and red. Good polish. Sparkles show indoors. There are a couple of small pits in the front of the specimen which can be seen in one of the photos. Measures 48.5mm x 35mm x 13.5mm. Weighs approx 38 grams.
