Iridescent Calcite Specimen - Oskaloosa, USA #2 green The Calcite which they form

The Calcite which they form within often leaves an imprint of the surface on the Polyhedral Agates

Talc is the softest known mineral

Celestite is a reasonably soft mineral

usually made of iron or manganese

It was discovered in 1910 and was registered as a trademarked name by its discoverer

Iridescent Calcite Specimen - Oskaloosa, USA #2 green The Calcite which they formThis beautiful iridescent Calcite specimen is from Oskaloosa, Iowa, USA and has gorgeous iridescent druzy like crystals giving a colourful sheen. You will receive the exact Calcite crystal pictured. Calcite is found all over the world in a variety of forms and colours, often in combination with other minerals. The more common forms of Calcite are Orange, Blue, Green and Yellow, Iceland Spar is a clear double refractive variety that forms natural