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Adamite
Adamite is a rare zinc arsenate mineral known for its bright yellow, green, and colorless crystals, often valued by collectors.

About ​

Adamite

Adamite is a beautiful zinc arsenate hydroxide mineral that forms in the oxidized zones of zinc-rich deposits. It is known for its bright colors, including yellow, green, and sometimes colorless forms, with copper impurities giving it a green shade. The mineral commonly appears as prismatic crystals, radiating clusters, or granular masses with a shiny vitreous to resinous luster. One of its most striking features is its strong fluorescence under UV light, where it glows green or yellow. Despite its attractive appearance, Adamite is relatively soft and brittle, making it unsuitable for regular jewelry use. It is mainly valued by collectors due to its vibrant colors and crystal formations. Additionally, because it contains arsenic, it must be handled carefully and is not recommended for prolonged skin contact. Overall, Adamite is admired more as a display mineral than a wearable gemstone.

Physical & Chemical Properties

NameAdamite
Scientific NameAdamite
Mineral GroupArsenate Mineral
Hardness (Mohs)3.5 – 4
ColorYellow, green, honey, colorless
OriginMexico, Greece, Namibia, USA, Turkey
Chemical FormulaZn₂AsO₄OH

Quick Facts

Crystal SystemOrthorhombic
Specific Gravity4.3 – 4.4
BirthstoneNo
Refractive Index1.70 – 1.74
Optical CharacterBiaxial (+)
DispersionLow
Major SourcesMexico (notably Mapimí), Greece, Namibia, USA, Turkey
Treatmentsuntreated
Price Range$20 – $200
Care InstructionsHandle with care. Avoid moisture, chemicals, and prolonged skin contact due to arsenic content. Clean gently with a dry or soft cloth.
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