$ 50,000 opal
How is Australian opal mined and what is it like to find a $ 50,000 opal? Video from the popular show Outback Opal Hunters.
The most expensive opals in order
Matrix opals impregnated with sugar, beautiful Mexican, Ethiopian, Brazilian and Australian opals.
Australian vs Ethiopian opal
How does color change arise?
What lies behind all those colors of opal? Probably the best video where the color of the opal is clearly shown.
How are gemstones made?
How it grinds, how it looks raw.