The Mineral BRASS
Brass is not an officially recognized mineral as yet, although it has been proposed.
It is not the man-made brass that is under consideration, but specimens of naturally occurring crystals of a copper nickel alloy with a formula similar to what we know as brass.
These specimens are also not common, but are extremely rare and have only been found in a couple of localities in Siberia, Russia.
Brass could be considered an official mineral if the naturally occurring crystals prove to have a unique structure and chemistry from other copper nickel alloys.
That may prove difficult or impossible and if so, brass will then be discounted as a mineral.
Brass is classified as an element dispite the fact, that in chemical reality, it is a compound.
Minerals like brass are
with metallic bonds that are very similar to the more pure metallic elements and are thus classified as
Color is yellow to brassy yellow.
Luster is metallic.
Transparency: Specimens are opaque.
Crystal System is isometric.
Crystal Habits are limited to tiny grains.
Cleavage is absent.
Specific Gravity is 8.4 - 8.7 (man-made brass)
Streak is brassy brown.
Notable Occurrences are limited to two localities in Siberia, Russia; Tolbachik Volcano, Kamchatka and Vol'sk-Vym Ridge, Middle Timan.
Best Field Indicator is color, locality, density and rarity.