Blue diamond is no doubt a darling of precious stone collectors around the world. Dementoids were discovered in the middle of the 19th century in the mountains of west central russia and have since been sought after by royal families all over the world. Jadeite is the purest rarest and most vivid gemstone in the jade family. Royal dementoids are currently valued at around 2 000 per carat. Since this deep green translucent gem is significantly rarer than other types of jade it is worth much more.
The blue diamond currently holds the record of the most valuable gemstone with a price of price about 3 93 million per carat. Jadeite 3 million per carat. Jadeite ranks near the top of a list of one of the most valuable gemstones in the world. The blue diamond currently holds the record of the most valuable gemstone with a price of price about 3 93 million per carat. Blue diamond is no doubt a darling of precious stone collectors around the world.