According to this formula a 1 carat stone may cost 1 000 while a 2 carat stone may cost 4 000. Indeed for some gems such as diamonds the price per carat can increase exponentially as the gem size increases. The price for the same colored gemstones may vary from as little as 10 per carat upto even 10000 per carat depending upon the quality and several other factors. Indeed for some gems such as diamonds ruby and sapphire the price per carat can increase exponentially as the carat size increases. Therefore a 1 carat stone may cost 1 000 while a 2 carat stone may cost 4 000.
Top of the range gem quality black opal can fetch prices up to aud 15 000 per carat. 3 00ct 450 per carat. Up to 2 5 cts. However rubies are also subjected to more treatments than almost any other gem. Average retail prices dec 2020.
Sources say the alexandrite gemstone can cost up to 70 000 per carat at the moment. Our value charts are based on accurate and up to date information on average retail prices. There are many factors including brightness and pattern which determine the overal value of opal. Musgravite 35 000 per carat. And for the classic colored gemstones the classic big three of colored gemstones rubies emeralds and sapphires the costs increase dramatically as the quality and size of the gem increases.
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Up to 1 00ct 155 00 per carat. However just because an opal is black doesn t make it valuable. For each gemstone we provide a detailed and comprehensive value chart which will help you evaluate its price based on the following criteria. Fine quality rubies are some of the most expensive gemstones with record prices over 1 000 000 per carat. This means that good quality sapphires and rubies in larger sizes tend to have a much higher price per carat.Read more in our article on the value of opal. Alexandrite 12 000 per carat. Read more in our article on the value of opal. Up to 1 00ct 155 00 per carat. Sources say the alexandrite gemstone can cost up to 70 000 per carat at the moment.
Alexandrite 12 000 per carat. Top of the range gem quality black opal can fetch prices up to aud 15 000 per carat. According to this formula a 1 carat stone may cost 1 000 while a 2 carat stone may cost 4 000.
