Malachite
Malachite · Decorative Stone and Mineral Specimen
Crystal System
Monoclinic; typically forms botryoidal, reniform, or stalactitic crusts and massive aggregates.
Mineral Group
Carbonates (specifically a basic copper carbonate)
Chemical Formula
Cu2CO3(OH)2
Formation Process
Supergene oxidation and weathering of copper ore deposits, typically in the upper oxidized zones of copper veins.
About This Crystal
An opaque mineral specimen exhibiting characteristic banded shades of vibrant green, ranging from pale pastel green to deep blackish-green. It features a botryoidal and undulating layered surface with a silky to vitreous luster on polished sections, though matte or earthy on untreated crusts.
Physical Characteristics
Light green streak, botryoidal habit, perfect cleavage in one direction (rarely seen due to massive form), conchoidal to uneven fracture, specific gravity of 3.6 to 4.0, brittle tenacity, and non-magnetic.
Optical Properties
Biaxial (-) with high birefringence and strong pleochroism in shades of green. It is opaque, displaying no dispersion or asterism, but distinctive concentric color banding.
Hardness & Durability
Origin Region
Democratic Republic of Congo, Russia (Ural Mountains), Australia, Arizona (USA), and France.
Hardness & Durability
Mohs hardness of 3.5 to 4. Poor toughness; it is quite soft, sensitive to acids, and scratches easily. Not recommended for daily-wear rings without protective settings.
Care & Maintenance
Clean with a soft, damp cloth only. Avoid all acids (even mild household acids like lemon juice or vinegar), hot water, steam cleaning, and ultrasonic cleaners. Store separately to prevent scratching.
Rarity & Value
Common to uncommon depending on the quality of patterning and size. Valued based on intricate banding, rich coloration, and lack of matrix flaws. Typically affordable to moderate price range.
Special Characteristics
Exhibits distinct concentric band patterns and fibrous botryoidal growth structures. Reactive to hydrochloric acid with effervescence.
Lore & History
Used historically by ancient Egyptians, Greeks, and Romans for amulets, ornaments, and ground-up pigment for eye shadow. In modern metaphysical practices, it is considered a stone of transformation, deep emotional healing, and protection, traditionally associated with the heart chakra.