Blue Diamond – $3.93 million per carat
Musgravite – $35,000 per carat
Jadeite – $20,000 per carat
Alexandrite – $12,000 per carat
Red Beryl – $10,000 per carat
Padparadscha Sapphire – $8,000 per carat
Benitoite – $3,800 per carat
Black Opal – $3,500 per carat