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Mineralpedia Details for Malachite

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Malachite

Malachite

Named for the Greek word malachi, meaning “mallow,” after the plant’s leaves in reference to malachite’s green color. Malachite is a common secondary copper mineral with thousands of localities and is found in oxidized copper deposits and in some cases is used locally as a copper ore. Malachite is commonly associated with azurite, as well as with cupite, cerussite, chrysocolla, calcite, and limonite.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/malachite.pdf

Formula
Cu2CO3(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Botryoidal, Stalactitic, Massive - Fibrous 
Cleavage
Perfect, Fair, None 
Luster
Vitreous - Silky 
Color
green, dark green, blackish green 
Streak
light green 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
3.5-4 
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Malachite from Mashamba West mine, Kolwezi dist., Katanga, Democratic Rep. of Congo

Malachite
            from Mashamba West mine, Kolwezi dist., Katanga, Democratic Rep. of Congo
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Malachite from Maid of Sunshine mine, Cochise Co., Arizona, United States

Malachite
            from Maid of Sunshine mine, Cochise Co., Arizona, United States

Malachite specimen full of tiny spherulitic crystals to 1mm formed by pseudomorphic replacement of Chrysocolla.

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Malachite from Tsumeb mine, Tsumeb, Namibia

Malachite
            from Tsumeb mine, Tsumeb, Namibia

Tightly packed, divergent, prismatic crystals.

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Malachite from Ray mine, Pinal Co., Arizona, United States

Malachite
            from Ray mine, Pinal Co., Arizona, United States

Tiny beads of Malachite to 0.75mm on water clear Selenite.

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Malachite from Grandview mine, Coconino Co., Arizona, United States

Malachite
            from Grandview mine, Coconino Co., Arizona, United States

Malachite crystals to about 0.75mm.

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Malachite from Delta mine, Delta, San Rafael dist., Emery Co., Utah, United States

Malachite
            from Delta mine, Delta, San Rafael dist., Emery Co., Utah, United States

A unique specimen of bead-like groups of Malachite to 1.5mm on yellow Boltwoodite. These two minerals are in turn covered with a thin, waterclear coat of Gypsum.

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Malachite from Bisbee, Cochise Co., Arizona, United States

Malachite
            from Bisbee, Cochise Co., Arizona, United States

Green botryoidal Malachite with concentric banding.

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Malachite from Luishia mine, Katanga, Democratic Republic of Congo

Malachite
            from Luishia mine, Katanga, Democratic Republic of Congo

Silky, shiny, deep green, fibrous Malachite to 5cm in a box-work group. 

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Malachite from Detroit mine, Morenci, Greenlee Co., Arizona, United States

Malachite
            from Detroit mine, Morenci, Greenlee Co., Arizona, United States

Handsome specimen of mostly Malachite pseudomorphs of Azurite crystals. There remains several very nice lustrous virgin Azurite crystals to 8mm. Most of the Azurite was replaced by Malachite and carry a nice, shimmering and velvety surface. These Malachite crystals are up to 8mm and are well-formed with sharp edges. Overall this is a very nice specimen originally from Les & Paula Presmyk. The Detroit mine at Morenci produced copper from 1884-1932 and is a very desirable locality.

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