Septarian Stone - Egg Nebraska fossil 000 year old crater near

000 year old crater near Aktyubinsk

Approximate Size of 1 piece: 8cm x 5

and as a radiation shielding material

you can have a Mini Mushroom on you at all times with this delightful charm

Mined from: Tarya Mine

Septarian Stone - Egg Nebraska fossil 000 year old crater nearMined from: Madagascar Description: Septarian stones are unique and beautiful limestone nodules with intricately spiderwebbed cracks of calcite running through them. They form when the cracks within sedimentary calcite nodules are filled with calcium carbonate rich water, which slowly crystallizes into black calcite. The calcite is highly UV reactive, glowing a bright yellow color under UV. The color inversion from black to yellow is quite striking!