- Ruby rough is often used to make beads or ornamental carvings.ruby necklace image by OMKAR A.V from Fotolia.com
Rubies are a relatively rare gemstone. Burmese rubies command the highest price. Stones that are recut or even exported before cutting are worth more per carat than native-cut rubies. According to the International Gem Society, clean, top-color gems command a retail price of $1,000 to $3,000 per carat.
- Emeralds have been thought to protect against epileptic fits when worn or carried.emerald ring image by studio vision1 from Fotolia.com
In general, the deeper and more vivid an emerald's color, the higher its value per carat. Most emeralds have small fissures called inclusions; the fewer the inclusions, the more expensive the emerald. A large, deep-green emerald with relatively few inclusions and little secondary coloration may fetch tens of thousands of dollars per carat.
- Diamonds have steadily increased in value and show no signs of slowing. The pricing of diamonds can range anywhere from $1,000 to $40,000 per carat, depending on clarity, cut and color.