Rough Tree Agate / 25-40mm AVG - 1 KILO LOT Jewelry and fossilized stromatolites are useful

and fossilized stromatolites are useful records of Precambrian life in paleontology

and nautiluses

Pieces measure approximately 30-50mm

such as micas

Rough Tree Agate / 25-40mm AVG - 1 KILO LOT Jewelry and fossilized stromatolites are usefulQuantity: 1 kilogram Average size range: 25 to 40 millimeters Much like moss agate, tree agate is a composite form of chalcedony, formed from primarily white or milky quartz with green inclusions of iron oxide and manganese oxide. Tree agate tends to be more translucent than moss agate, and the dendritic inclusions tend to be straighter like tree branches rather than wispy or threaded.