Pearls, black opal, and Chocolate Diamonds are highly sought-after gems. Although demand is part of what drives up their cost, there are many other factors that determine their value, including colors and sizes.

Timecodes
00:00 Why pearls are so expensive
00:00 Why Chocolate Diamonds are so expensive
00:00 Why black opal is so expensive

Original videos linked here:
Why Pearls Are So Expensive
https://youtu.be/O0ihGlsLL1Y
Why Chocolate Diamonds Are So Expensive
https://youtu.be/OtyD9EXB2pA
Why Black Opal Is So Expensive
https://youtu.be/RA9wxEbnhVU