Specularite (2 pcs) | Michigan grey Mepygurus marmonti is an extinct

Mepygurus marmonti is an extinct genus of sea urchin

Quartz (SiO₂) is one of the most abundant minerals on Earth

75” and weighs 20

5” (each side) and weighs 12 oz

also known as Rugose Coral or Tetracorallia

Specularite (2 pcs) | Michigan grey Mepygurus marmonti is an extinctSpecularite is a variety of hematite ( Fe2O3 ), and is also known as specular hematite. It often forms with a silvery shimmery with metallic black or blue hues. The name specifically references the mirror like quality of the crystals of this hematite. In both ancient and modern times it is often associated with strength and courage. This purchase comes with two pieces. Each item is around 1. 5" x 1" and weighs 2. 15 oz total