2.5" Rosasite, Aurichalcite and Malachite Association - Utah

 
This colorful specimen contains deep blue-green colored, botryoidal rosasite formations, green botryoidal malachite and aurichalcite. It was collected from the Hidden Treasure Mine in the Ophir District of Utah, a location that's well known for its zinc and copper mineral deposits.

Rosasite is a secondary mineral that forms in oxidation zones of copper-zinc deposits, generally forming a fibrous botryoidal sphere that can appear vitreous and silky. While typically featuring a blue-green color, colorless specimens are not unheard of. The chemical formula of rosasite is CuZnCO3(OH)2.

Malachite is an intense green, copper based mineral that can be found in a wide variety of forms. Malachite can grow in botryoidal masses, stalactitic, and reniform formations, typically as a tight cluster of fanning fibrous needles that make up a seemingly solid mass. As layers continue to stack during formation, a banded pattern can sometimes begin to take shape, which explains the rings in all shades of green that are seen on most polished malachite specimens.

Malachite results from the weathering of other copper ores and is very often found associated with other copper-based minerals such as Azurite and Chrysocolla. It can be found in copper deposits around the world, but the Democratic Republic Of The Congo is the primary source for polished malachite and mineral specimens.

Malachite has been prized since ancient times, first as a utilitarian copper ore, and then as an ornamental stone. Due to it's value as a decorative stone, it's rarely mined as a copper ore anymore.
DETAILS
SPECIES
Rosasite, Aurichalcite & Malachite
LOCATION
Hidden Treasure Mine, Ophir District, Utah
SIZE
2.5 x 2"
SUB CATEGORY
ITEM
#109812