Polished fossil Oncolite slab. ONC117 chrysoprase Tumble polished Peanut Wood

Tumble polished Peanut Wood

115 mm x 60 mm x 40 mm thick

TI284   Tiger Iron slab

Eucryptite is a lithium aluminium silicate that occurs in LCT pegmatites

Polished fossil Oncolite slab. ONC117 chrysoprase Tumble polished Peanut WoodONC117. Fossil Oncolite polished slab. From the Miocene "Trealla Limestone" north of Carnarvon, Western Australia . Age is approx. 15 million years. Dimensions at widest points approx. 160 mm x 80 mm x 8. 5 mm thick. Weighs 217 grams. Oncolite is a limestone composed largely of oncoidsrounded, coated grains that grow as thin layers of lime mud accumulate around a tiny nucleus (such as a sand grain or shell fragment) under microbial influence. Formed