Adamite

A zinc arsenate forming lime-green crystal sprays that glow vivid green under UV.

Adamite specimen — Photo: Robert M. Lavinsky, CC BY-SA 3.0, via Wikimedia Commons

How to identify adamite

Lime-yellow-green crystals on brown limonite.
Glows bright green under UV light.
Soft — a knife scratches it.

Often confused with

Pyromorphite
Pyromorphite forms hexagonal barrels and is heavier.
Compare side by side

Where it's found

Ojuela mine, Mapimí, Mexico
Laurium, Greece
Tsumeb, Namibia

Uses

Collector specimens.

Rock tumbling

Not suitable for tumbling. Contains arsenic.

Did you know?

Specimens from the Ojuela mine in Mexico are famous for their fluorescence.

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