Blue diamonds are among the rarest gemstones on Earth. Their color comes from traces of boron, and they can fetch prices up to $3.93 million per carat. The famous Hope Diamond is perhaps the most well-known blue diamond in existence.
The finest quality jadeite, known as "Imperial Jade," has a vivid emerald-green color and can command prices of up to $3 million per carat. It's particularly valued in Chinese culture, where it symbolizes purity and moral integrity.
Red diamonds are so rare that only about 30 are known to exist in the world. Their value can exceed $1 million per carat, making them one of the most expensive gemstones by weight.
First discovered in 1967 in Australia, musgravite is a tremendously rare gemstone. Its rarity has earned it a price tag of approximately $35,000 per carat.
Famous for its color-changing properties (green in daylight, red in incandescent light), high-quality alexandrite can cost up to $30,000 per carat. Its rarity has made it increasingly valuable in recent years.
Fine-quality rubies, especially those from Burma (Myanmar), can sell for prices exceeding $15,000 per carat. The most valuable rubies have a pure, vivid red color known as "pigeon's blood."
Top-quality emeralds with minimal inclusions and a vivid green color can sell for up to $15,000 per carat. Colombian emeralds are particularly prized for their exceptional color.
Pink diamonds from Australia's Argyle mine (now closed) are highly sought after. High-quality specimens can sell for $10,000 to $700,000 per carat, depending on intensity of color.
With its electric blue-green color, Paraiba tourmaline can sell for up to $10,000 per carat. First discovered in Brazil in the 1980s, it's one of the more recent additions to the list of highly valuable gemstones.
This rare blue gemstone is found almost exclusively in San Benito County, California. Its scarcity and beautiful color contribute to prices of up to $4,000 per carat for fine specimens.