What are the most expensive gemstones in the world? There are many that are worth unbelievable amounts and are incredibly rare. We will be looking at three of the most costly ones on the market as of 2018.

Gemstones are a beautiful and almost mystical expense-they have been sought after and prized for thousands and thousands of years. Their values do change over time, but the stones on our list will be current as of this past year.

To compare the different gems, we will be looking at their price per carat, and how much some individual stones in each category have sold for over the years.

Choose Your Most Expensive Gemstone

We will start with the least expensive of the three, and working up to the highest price as the last gem we talk about.



The first gemstone on our list is jadeite. It is the most beautiful and rare variety of jade. This stone does actually come in different colors, but it is best known for the rich green emerald color.

The most precious stones of this kind are found in Myanmar. In many cultures, including the Chinese and Maori ones, this gemstone is a very large part of their past weapons, carving, and jewelry. It is even something that is used spiritually and medicinally as well. The Aztecs, Mayans, and Olmecs value it even more than solid gold.

This is also a fantastic, wearable stone. Jadeite is very tough, and has a great resistance to breaking. On the Mohs hardness scale, this gemstone scores a 6.5-7.

Its durability is another reason it is so sought after. It is able to be passed down generation after generation without being destroyed or even tarnished.

As far as pricing is concerned, this stone will cost you. It is said to be priced at about $20,000 per carat for the most rare specimens. This is the least expensive gemstone on the list, if that tells you anything about how pricey these items can truly be.



Next in the lineup is musgravite. This is an extremely rare mineral that is pretty closely related by composition to taaffeite, which is another fairly rare mineral. It has an appearance and color similar to an amethyst, with a deep blue or purple/violet color to it.

The stone was discovered in 1967, mined from the Musgrave Range of South Australia. There are only eight known specimens of this gemstone as of 2005, but since then they have been found in Madagascar, Antarctica, Sri Lanka, Greenland, and even Tanzania.

There are even certain musgravite stones that actually have tiny tubes inside of them. They display gorgeous colors when put in direct light, which comes from incredibly tiny film iridescence that is in the air filled tubes which are crystallographically aligned. These are the rarest form of musgravite, and only a couple of examples of this have ever been found on earth.

Because of how truly rare it is, this stone costs about $35,000 per carat.

Blue Diamond


Our third and final stone is the most expensive gemstone in the world as of 2018. The blue diamond costs more than any other gem you can purchase, and there are a few reasons why.

First of all, it is an extremely rare phenomenon. No two colored diamonds are exactly alike, each one has its own color and their own characteristics.

Blue diamonds have one of the highest rarities of all diamonds. They are rarer than pink diamonds but slightly less rare than the red and purple ones. It mostly depends on the shade, because the stronger the color-the more precious it is.

The blue color of this diamond actually comes from boron in the gem’s carbon composition. While there are a few different qualities that these diamonds are judged on for pricing, color is by far the most important.

Their grading scale includes many different shades: faint blue, very light blue, light blue, fancy light blue, fancy blue, fancy intense blue, fancy deep blue, fancy vivid blue, and even one called fancy dark is any other colors are present.

Most pure blue diamonds are referred to as type LLB, which means they either have very few nitrogen impurities or absolutely none at all. This accounts for about 0.1% of diamonds found.

For the rarest blue diamonds, the cost can be as much as 4.3 million dollars per carat. This, of course, does depend on the richness of the color and other features such as the carat weight, clarity, and the cut of the stone.

What Do You Think of the Most Expensive Gemstones?

There you have it, the most expensive gemstones in the world. Which ones on the list surprised you? Do you have any favorites? Again, these are subject to change over time, as more rare gemstones are discovered and others are sold.