Mineral Identification - Streak
9:32
Mineral Identification - Hardness
7:55
Cleavage and Fracture
13:46
Mineral Identification Properties
19:17
Rock and Mineral Identification
4:11
Specific Gravity test for mineral identification.
9:39
Mineral identification using Luster, Color, Streak, Hardness and Breakage
20:14
$6000 investment - The best cut ever - Rare Harlequin Black Opal
10:07