Information about Enargite

Enargite is a dark gray to black copper arsenic sulphide mineral with a metallic luster.

It typically forms as prismatic, tabular, or massive granular aggregates. Freshly broken surfaces reveal a bright metallic sheen, but exposure to air causes it to develop a dull, tarnished appearance.

Uses and History

Enargite is an important ore of copper, containing approximately 48% copper by weight, along with arsenic and sulphur.

It is primarily mined for copper extraction, although its high arsenic content complicates refining processes. Due to its arsenic content, enargite has no significant industrial or commercial applications outside of mining. However, well-formed crystal specimens are highly valued by mineral collectors.

Enargite was first described in 1850. Its name comes from the Greek word “enargēs” (ἐναργής), meaning “distinct” or “visible,” referring to its well-defined crystal structure.

Mineralogy

Hazards and Warnings

Contains arsenic – toxic – please handle with care, avoid ingesting, inhaling, etc.

Mineral collectors should wash their hands after handling specimens, to avoid any exposure to potential toxins.

Almost all rocks, minerals (and, frankly, almost all other substances on earth) can produce toxic dust when cutting, which can cause serious respiratory conditions including silicosis.

When cutting or polishing rocks, minerals, shells, etc, all work should be done wet to minimise the dust, and a suitable respirator or extraction system should be used.

Translations

Further Reading / External Links

• https://www.mindat.org/show.php?id=1380&ld=1
• https://en.wikipedia.org/wiki/Enargite
• https://www.minerals.net/mineral/enargite.aspx
• https://museum.wales/mineralogy-of-wales/database/?mineral=221&name=Enargite