18 Most Rare & Expensive Gemstones

From the most beautiful stones in the world to the most expensive rocks you’ve ever seen these gemstones are worth a shocking amount of money
18 Fire opal
17 Demantoid Garnet
16 Taaffeite
15 Benitoite
14 Poudretteite
13 Musgravite
12 Sapphire
11 Emerald
10 Red Beryl
9 Alexandrite
8. Ruby
Rubies come in vibrant shades of dark red, bright red, and purple-red. Like diamonds, they are found globally except for Antarctica. The most valuable of these gemstones come from Asia, and its main exporters are Sri Lanka, Thailand, and Myanmar. The "pigeon's blood" varieties that spot a pure red and violet gue are by far the most popular. A ruby can go for about $15,000 in the world market because of their limited numbers.
7. Rough Diamond
The most desirable of all gemstones is a rough diamond, and it also happens to be amongst the most expensive. The wedding industry could be blamed for the enormous popularity of cut diamonds globally. Besides that, most women wouldn't mind adding a jewelry piece carrying diamonds to her collection. Presently, perfectly cut D color diamonds can fetch as much as $15,000 per carat.
6. Serendibite
The extremely rare gemstone originally came from Sri Lanka in 1902. The inosilicate features a complex chemical formula and comprises of aluminum, magnesium, calcium, and boron. One of these gemstones recently came out of the Mogok mines in Myanmar. The serendibite goes for $18,000 per carat.
5. Jadeite
The Jade's most beautiful and rarest stone just so happens to also be the most expensive. It has been mined in a variety of colors, but its rich-emerald color continues to be the most favored, and these jadeites originate from Myanmar. However, mauve, apple green, and lavender jadeites are also quite popular with buyers.
The stone also forms an integral part of the Mesoamerican, Maori, and Chinese cultures where they are used to carve weapons, fashion jewelry, and also used for medicinal and religious purposes. Jadeites are currently priced at about $20,000 per carat.
4. Grandidierite
The greenish-blue or yellow-blue mineral is quite rare and was first discovered in Sri Lanka. However, in the twentieth century, Alfred Grandidier, a French explorer, found a bulk of the minerals in Madagascar. Only about two dozen of the faceted grandidierite exist today. The stone borrowed its name from its founder. The unique gemstone goes for $30,000 per carat.
3. Red Diamond
Considered the most expensive gem in the world, the red diamond would set you back US$1 million per carat. In the history of mankind, very only 30 samples of these gemstones have been found, and most weigh under 0.5 carats. Australia's Argyle diamond mine is the only place where these diamonds can be mined, and only a few stones are extracted from it each year.
While most people might assume that the red color is an impurity, it comes from the deformation of the crystal lattice. The priciest and largest of these stones ever sold was the Moussaieff Red Diamond that went for $8 million in 2011.
2. Blue Diamond
Colored diamonds tend to be amongst the most expensive gemstones in the world because of their rarity and spectacular brilliance. Colored diamonds occur in a spectrum of black, yellow, champagne, red, chocolate/brown, pink, green, and blue colors. The most popular are the Pink Star and Oppenheimer Blue.
The Oppenheimer Blue diamond has a vivid blue hue and its the largest of such diamonds to go on auction selling for $57.5 million. That particular piece weighed 14.62 carats translating to $3.93 million per carat. The Pink Star recently broke the record selling for a whopping $71.2 million for a 59.6-carat piece.
1. US$3 Million Rare Black Opal
Bobby, an Australian miner, found an opal back in 2002. After he fell on hard times, he sold his mining equipment and took home his last bucket of rocks. He began rubbing the grimy stones and discovered hints of gold and green. It took Bobby two years to whittle the encasing rock away from the gemstone hidden inside. What he ended up with was an extremely rare 306-carat black opal. You'd think that he would cash in on the precious stone, but instead, he kept it tucked safely underneath his mattress for another 12 years.
It kind of reminds you of a certain character from The Lord Of The Rings, and Bobby himself said that he considered it one of God's greatest creations that he had to guard. He finally entrusted it to Katherine Jetter, an Australian jewelry designer who debuted it at a Wynn Hotel, Las Vegas Couture show for US$3 million. The black opals generally sell at $3,500 per carat.
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