Why Black Opal Is So Expensive | So Expensive

14:17
950 carat uncut gem rough opal - I'm going in!

22:55
The Fight For The $150 Million Emerald Industry In Colombia | So Expensive | Business Insider

8:10
The Bushmen Find Spectrum Opals Worth $100,000! | Outback Opal Hunters

7:13
Why Benitoite Gemstones Are So Expensive | So Expensive | Business Insider

16:43
Top 10 | Most Beautiful and Fascinating Opals Around the World

20:14
$6000 investment - The best cut ever - Rare Harlequin Black Opal

26:06
Forging a Copper Damascus Katana

22:39