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Prices Many dealers say jadeite is less expensive in the United States than in the Orient. Like most gemstones, the larger the piece of jade, the more valuable the piece. Burma jadeite is bought and sold on individual pieces according to MM sizes. The most common sizes are 8mm x 10mm, 10mm x 14mm, and 13mm x 18mm. The 8 x 10's are usually 2-3 carats. The top material around 8 x 10mm in size can wholesale for $2000-$3000 per carat.
But in the case of many rarer gems, price does not increase in a linear fashion as the weight increases. Indeed, for some gems, such as diamonds, the price per carat can increase exponentially as the gem size increases. Therefore, a 1 carat stone may cost $1,000 while a 2 carat stone may cost $4,000. This means that good quality sapphires and rubies in larger sizes tend to have a much higher price per carat.