Diamonds, rubies, sapphires, and emeralds are all considered to be precious gemstones, whereas most other types of gemstones (quartz, tiger’s eye, agate, etc.) are filed under the semi-precious category. The reason that diamonds, rubies, sapphires, and emeralds are so prized is largely because they are rare, whereas most semi-precious gemstones are relatively common by comparison. The rarer a gemstone is, the more expensive it tends to be.

What are the most valuable gems in the world according to both rarity and price? We all know that diamonds, rubies, sapphires and emeralds fall on the list. Let’s take a look at some particularly unique species of these stones as well as others you may not be as familiar with.

10. Blue garnet

9. Painite

8. Jeremejevite

7. Red beryl

6. Alexandrite

5. Serendibite

4. Grandidierite

3. Red diamonds

2. Jadeite

1. MusgraviteThis silicate mineral gemstone was first found in Musgrave, Australia, and thus the name “musgravite.” Since then, the stone has been found in Sri Lanka and Madagascar, as well as in Greenland. Musgravite is generally violet in color, usually with a grayish tint. Stones may be light or dark in color. As this stone is still incredibly rare, it may be valued at around $35,000 per carat.

Take special note that the prices which are quoted in this article are estimates only. The worth of a particular gemstone may rise or fall with popular trends as well as new discoveries in the field. Some specimens may be more valuable than others because of elements such as clarity or cut. The setting of a gemstone can also influence its value. Each of these gemstones commands a high price on the market, and every one of them has its own unique beauty. Count yourself lucky if you ever get to see one in person.