Nabesite

Nabesite is a rare silicate mineral of the zeolite group with the chemical formula Na₂BeSi₄O₁₀·4(H₂O). It occurs as colorless to white orthorhombic crystals in thin platy mica like sheets. It has the zeolite structure. Its Mohs hardness is 5 to 6 and its specific gravity is 2.16. The reported refractive index values are nα=1.499, nβ=1.507, and nγ=1.511.

Additional recommended knowledge

Daily Sensitivity Test

Daily Visual Balance Check

Weighing the right way

It was discovered in the Ilimaussaq intrusive complex, of West Greenland, and first recognized in 2000. It occurs in tugtupite-bearing albitite, a rare highly alkaline igneous rock.

References

• Webmineral.com data
• Mindat.org