Hardness (Mohs) Mineral Group
     
8 Londonite  
8 Painite  
8 Pezzotaite Beryl
8 Spinel  
8 Topaz  
8 - 8.5 Musgravite Magnesiotaaffeite
8 - 8.5 Taaffeite Magnesiotaaffeite
8.5 Alexandrite Chrysoberyl
8.5 Chrysoberyl Chrysoberyl
8.5 Rhodizite  
8.5 Vanadium Chrysoberyl Chrysoberyl