Posted in Web Beryl: Mineral information, data and localities. – mindat.org June 26, 2024 Formula: Be3Al2(Si6O18) Colour: Colorless, green, blue, yellow, white, pink, etc. Lustre: Vitreous, Sub-Vitreous, Waxy, Greasy. Hardness: 7½ – 8. Specific Gravity: 2.63 – 2.92. Crystal System: Hexagonal. Member of: Beryl Group. https://www.mindat.org/min-819.html