Mesolite is a zeolite that forms tufts of long, transparent, slender crystals.

Chemical Formula: Na2Ca2Al6Si9O20(8H20)
Class: Silicates
Hardness: 5
Coloration: White, Colorless

How to identify it/Unique Characteristics or Properties:
Mesolite is a zeolite that forms tufts of long, transparent, slender crystals. The crystals can be large enough to easily distinguish, or they can grow so fine that it resembles a puffball more than anything else. It can also grow in larger slabs without crystals, but that is much rarer.

Where to find it in…

The Northwest: Coffin Butte OR, Foster Dam OR, Camp Adair OR
Other: Ireland, India, Antarctica, Scotland, Iceland
Past Uses: Mainly just collected for its interesting looks.
How it was Made: Forms in cavities within basalt and near gas veins.