"Mandarin garnet" specimens are the most in demand and the most expensive. Spessartine gem quality stones are rarely larger than 5 to 7 carats in weight. The mineral is also found in Africa, India, ...

18. Platinum Cost: $33.02 per gram Platinum is a beautiful precious metal that is in a similar category as gold and silver. All three of these metals are frequently traded in the global markets ...

The gemstones listed below are the world's most expensive, as per the median price per carat. 20. Black Diamond $3,000 - $5,000 View this post on Instagram ...