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Amblygonite

A lithium aluminum phosphate from pegmatites, usually white and blocky.

Amblygonite specimen
Photo: Luis Miguel Bugallo Sánchez (Lmbuga Commons)(Lmbuga Galipedia) Publicada por/Publish by: Luis Miguel Bugallo Sánchez, CC BY-SA 3.0, via Wikimedia Commons

How to identify amblygonite

  • White to pale yellow blocky masses.
  • Looks like feldspar but is heavier.
  • Hardness about 6.

Often confused with

Where it's found

  • Minas Gerais, Brazil
  • Maine
  • Black Hills, South Dakota

Uses

Lithium ore and rare gems.

Rock tumbling

Can be tumbled with care.

Did you know?

Its name means 'blunt angle' in Greek, after its cleavage.

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