Mineral Spotlight - Topaz

3,595 views · Published 14 December 2018 · 2:24 · Indexed 18 October 2026

Channel: MrLundScience · 2018 · Science & Technology

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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

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