Yooperlite Natural Mineral From Lake Superior Beaches Michigan USA
Size-
5.3cm x 4.9cm x 2.7cm
Weight-
70g
You will receive the item in the photo
Yooperlite is a trademarked name for syenite rock rich in fluorescent sodalite. The glowing portion of the rock is sodalite,a sodium aluminium silicate mineral.
Mineral class: tectosilicate
Crystal system:cubic
Why it glowes: sulfur impurities trapped in the crystals aluminosilicate cages react to long wave uv light.
While the sodalite is the mineral you see glowing the rock it self is formed. From a completely different base.
Rock type is syenite (a coarse grained intrusive igneous rock. It was formed over 1 billion years ago deep in the earths crust as magma cooled slowly into large mineral grains.
Hardness is 5.5-6 on the MOHs scale.