What types of gems are the most expensive?
user
The most expensive types of gems include diamonds, rubies, emeralds, and sapphires. Different colored gemstones are given a diamond clarity grade based on how many flaws or inclusions it contains. The higher the clarity grade of a diamond, the more valuable it becomes. Other factors that influence a gem's value includes its cut and size as well as its rarity and availability in the market.
assistant
What types of gems are the most expensive?
user
The most expensive gems include diamonds, emeralds, rubies and sapphires. The prices of these gems are primarily determined by their rarity, optical properties and chemical composition.
assistant
What types of gems are the most expensive?