08980 - Top Rare 0.924 g NWA Unclassified Ureilite Achondrite Meteorite Polished Section Ectillaenus - Calcite is a carbonate

- Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3)

Schlüter 1871 (ammonite)

Because of this

Impressive natural association of these two beautiful teeth (mosasaur + shark)

Kunda Regional Stage

08980 - Top Rare 0.924 g NWA Unclassified Ureilite Achondrite Meteorite Polished Section Ectillaenus - Calcite is a carbonateBeautiful polished section of this rare NWA Ureilite achondrite meteorite. Ureilite is a rare type of stony meteorite that has a unique mineralogical composition very different from that of other stony meteorites. This dark grey or brownish meteorite type is named after the village Novy Urey, Mordovia Republic of Russia, where a meteorite of this type fell on 4 September 1886. Notable ureilites are the Novo Urei and the Goalpara, also named for the