来自MSN2 个月
35 Most Valuable Gemstones, From Least to Most Expensive
However, it might surprise you to know that there are precious stones that are rarer and more expensive than these popular ones. A number of the most valuable gemstones are new discoveries that ...
Tempo16 天
5 Rarest Gemstones in the World, Rarer than Diamonds
From Tanzanite to Benitoite, this article unveils the five rarest gemstones in the world that hold more than vibrant colors.
Business Insider3 年
Why black opal is one of the most expensive gemstones in the world
Narrator: High-quality black opal can cost over $10,000 per carat, making it one of the world's most expensive gemstones. But mining black opal isn't easy. After investing tens of thousands of ...
GIGAZINE1 个月
What gemstones form in the deepest parts of the Earth?
Most gemstones are found at depths of 5km to 40km ... What is the 'new fact deep inside the Earth' that was trapped inside the ultra-rare diamond? - GIGAZINE Along with diamonds, peridot is ...
Business Insider3 年
Why pearls, black opal, and chocolate diamonds are so expensive
High-quality black opal can cost over $10,000 per carat, making it one of the world's most expensive gemstones. Over 90% of black opals come from Australia, but they aren't easy to find.