20082 - Nice 1.34 Inch Aragonite Twinned Crystal Cluster - Safro Mine, Bou Azzer, Morocco Palaeonotopterus Richterarges
Yard notes & kiln story
Description
Richterarges
Most pieces have a thin weathering rind
Age range: 412
Phacopidina
This tooth has an outstanding preservation
20082 - Nice 1.34 Inch Aragonite Twinned Crystal Cluster - Safro Mine, Bou Azzer, Morocco Palaeonotopterus RichterargesAragonite is a carbonate mineral, one of the three most common naturally occurring crystal forms of calcium carbonate, CaCO3 (the other forms being the minerals calcite and vaterite). It is formed by biological and physical processes, including precipitation from marine and freshwater environments.