Mineral Spotlight – Topaz
Topaz
Chemical Name: Aluminum Silicate Fluoride Hydroxide – Al2SiO4(F,OH)2
Group: Nesosilicates
Mohs Hardness: 8
Crystal System: Orthorhombic
Form/Habit: Prismatic
Cleavage: Perfect basal
Fracture: Subconchoidal to uneven
Luster: Vitreous
Streak: Colorless
Specific Gravity: 3.4 – 3.6
Healing Properties: None