Fretz HMR-303 Ball Pein Hammer Prop 65 - Silica 1 length of 24 inches
Baker’s notes & crumb story
Description
Fretz HMR 303 Ball Pein Hammer Prop 65 Silica 1 length of 24 inches 1 length of 24 inches plus 1 length of 16 inches plus 1 length of 20 inches you can observe characteristic light reactions that reveal important optical properties—an essential test in gem identification