To learn more about the mineralogy of the Beryllonite, see mindat.org.
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Beryllonite
- Translations : Beryllonit, Beryllonita, ベリロナイト, Бериллонит, 磷钠铍石
- Etymology : Because beryllium is part of its chemical composition.
- Discovery: 1888 by Dana
- Type localityMt. Mckean, Stoneham, Oxford co., Maine, USA.
Gemological data
- Chemical formula : Na Be PO4
- Hardness (Mohs) : 5.5 - 6
- Density : 2.77 - 2.85
- Refractive index : nα = 1.552 nβ = 1.558 nγ = 1.561
- Birefingence : 0.009
- Crystal system : Monoclinic
- Group : Phosphates
The gallery
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