Deep blue azurite is the main mineral found today in Cochapata, accompanied by light green malachite and, less commonly, light blue chrysocolla (figure 1). The most attractive specimens have malachite ...

Azurite crystals (e.g., the Electric Blue from the Milpillas mine) show dark, blue color with high luster, and they are usually 1–2 inches long prisms or blocky crystals up to 4 inches long. They were ...

Minerals are solid, naturally occurring substances with well-defined crystal structure and chemical compositions. Rock and mineral collecting is a popular hobby for amateur and expert rock fans alike.

The green ones are almost always malachite (we have verified this on most manuscript cuttings where azurite is present), and it had usually been assumed that the orange to black crystals were ...

KARABACEK MINERALS PURCHASED BY MUSEUM Most Important Addition for Dept, of Mineralogy Since 1913--Many New Specimens NO WRITER ATTRIBUTED March 21, 1935 ...

Over time, the native copper was weathered and formed the malachite and azurite on the outside joint surfaces of the rock. The copper minerals occur in a 14-inch thick bed and is 2.07% copper, not ...

Carefully documented specimens of ancient Persian pigments taken from the surface of the limestone reliefs at Persepolis and Pasargadae, and several bulk specimens excavated at Persepolis, have been ...