1.5" Vivid Blue, Cut/Polished Azurite Nodule - Siberia

This is an incredibly vivid-blue azurite nodule that has been cut in half and polished. One half of the nodule is included. These vibrant nodules/geodes come from Rubtsovsk mine in Altai Krai, Siberia.

Azurite is a copper carbonate hydroxide mineral that is best known for it's beautiful and vibrant blue appearance, Azurite typically forms in nodular formations with other colorful, copper rich minerals. Azurite is a secondary mineral that forms in pores, crevices, and caverns as water with high concentrations of carbon-dioxide precipitate.

Azurite and malachite are known to form in union with each other, for their chemical makeup is very similar. In fact, the presence of more or less water in the location of formation, is enough to determine whether an abundance of malachite over azurite, or vise-versa, will accumulate.
Rubtsovsk Mine, Rubtsovsky District, Altai Krai, Siberia, Russia
Polished face 1.5 x 1.3", up to .6" thick