Azurite nodule with Malachite

Azurite nodule with Malachite- Blue Ball Mine, 3 miles south of Miami, Gila County, Arizona. Two halves of a hollow azurite nodule filled with fine, hair-like crystals of green malachite. 3.5 cm across each.  

Petrified wood with boring holes- "Teredo wood"

Petrified wood with boring holes- “Teredo wood” Volga RIver, Village of Gorodishche, Ulyanovsk, Russia. Cretaceous period 110 mya. 15.25″x 9.25″ … A fantastic rip cut slab of “Teredo” bored wood with Pyrite filling all the...