Auction Fall-Through = Your Gain! - Now More Than 50% Off RRP - 61.4cts - Opalised Shell Rare Geological Specimen from South AustraliaA beautiful and rare South Australian Opalised partial Shell Geological Specimen. Displaying predominantly potch Opal with the shell grain still visible. These types of specimens are ever growing in rarity, making them highly appealing to opal collectors and rockhounds. Total Weight 61. 4cts Dimensions 38mm x 24mm x 15mm Area of mine Outback South Australian Opal Fields Formation opalised shell shell fossil replacement opal Colours earth colours