12:17

What are the colors of garnet gemstones?

15:24

Are rocks magnetic?

33:13

Rough Ruby, sapphire and Corundum identification measuring hardness using HMKIS diamond tester🔥💎🔥💎

1:11:32

Gem-A Live: Understanding Gemstone Species and Varieties

20:14

$6000 investment - The best cut ever - Rare Harlequin Black Opal

18:33

Testing Gemstone Physical Properties | Gem Destruction!

17:30

Episode 48: Garnet 101

20:03

Vietnam Unearthed: Ruby, Spinel, Sapphire and more, explore gemstones and gem mining in Luc Yen.