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The World’s Most Expensive Diamonds – The Shocking Truth

world's most expensive diamonds

The World’s Most Expensive Diamonds – The Shocking Truth

by | Sep 19, 2016 | Uncategorized, Diamond Buyer, diamond buying and selling, Selling Diamonds

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You Won’t Believe The Staggering Cost Of Some Of The World’s Most Expensive Diamonds

What if you could own one of the world’s most costly diamonds?

Well, you can! That is if you have millions and millions of dollars. We are your local Austin diamond buyers and before we reveal the jaw-dropping figures, let’s first discuss what determines the cost of a diamond.

How To Examine A Diamond Like A Pro

First things first

There are 4 major factors to determine how much a diamond is worth, know as the 4C’s of diamond grading.

# 1 The Cut

Simply put, this refers to the shape of the diamond as well as the proportions, symmetry and polish.

# 2 Clarity

There are 11 Grades to determine your diamonds clarity. The fewer inclusions, or blemishes in a stone, the better the clarity grade.

# 3 Color

This refers to diamonds that lie within the color range, not “fancy” color diamonds that are blue or red. Actually, the less color, the more valuable the stone is.

# 4 Carat

As most people already know, this is a way to measure the size of a diamond.

You can learn more about the 4C’s from the Gemological Institute of America (GIA)


Now Onto The Fun Stuff

Breaking News!!

The 14.62 carat “Oppenheimer Blue” diamond just sold for a record-breaking $57.5 million, according to CNN Style. It was sold to a private collector and is the best quality and largest blue diamond ever sold at an auction.

In case you are wondering, blue diamonds make up about only .0001% of all of the world’s diamonds. This solves the mystery of why they are so expensive.

Some Other Ridiculously Expensive Diamonds

The Koh-I-Noor Diamond: Priceless

  • The name comes from the Persian phrase; “Mountain of Light”
  • It is 105 carats
  • Came from Golconda in the Andhra Pradesh state of India
  • It remains in the possession of the British Royal Family and is held at HM Tower of London

The Hope Diamond: $350 Million

  • 45.52 carats
  • Located at the Smithsonian Museum of Natural History in Washington DC

The price of rough diamonds is on the rise, and investors are getting in on the action. 

Crazy Expensive Diamonds Actually Owned By Real People

A Word Record

In 2010 a businessman from Hong Kong-based Chow Tai Fook Jewellery paid $35.3 million for the Cullinan Heritage diamond, weighing in at 507 carats. This is the highest price ever paid in the world for a rough diamond. This diamond is expected to sell for a staggering $25 Million.

The Price For “Flawless” Diamonds

Ever heard of Harry Winston?

Sold at Christie’s auction in Geneva for $26.7 million, was the “Winston Legacy” Diamond which is said to be a “flawless” 101.73 carats.

What About Us Regular People?

Don’t feel bad

The gems that we mentioned here along with most of the world’s most expensive diamonds are either on display in a museum or owned by private collectors. Even most celebrities rent their diamond jewelry for special events.

Bottom line

It’s fun to fantasize but the majority of us will just have to appreciate these diamonds from afar. Be sure to contact us if you are interested in selling your diamonds.  And don’t forget to check out more blog posts for fun stories and tips on selling diamonds! 

 

The owner was very knowledgeable about not only gold but silver and miscellaneous jewelry as well. He carefully evaluated the many items I had collected from my mother's estate and then sorted them into groups depending upon their value. After spending approximately an hour evaluating the items I brought him he determined the value and wrote us a check in an amount that I felt was extremely fair.
Richard B.
4/09/2026
Moran was awesome, We have a great conversation and good business, definitely a great place to deal with, highly recommend.
Jose P.
2/27/2026
Very fair price. Same day pay. Friendly and Great service!:) Definitely recommend. The process was simple, easy, and fast.
Gracyn N.
2/27/2026
I’ve taken rings to Moran on two separate occasions and both times I was not disappointed. Last year, I had a family heirloom ring that I was hoping to sell. I brought in and after close examination he purchased it on the spot for a price that was more than fair.
Then last week, I brought in a 14k ring that turned out to be cubic zirconia. I wouldn’t have wasted his time if I’d known that it wasn’t real. He was very kind about it and offered to buy the gold, which proved to be well worth the trip.
He's extremely knowledgeable and efficient. It is not a long and tedious process.
Almost as important, he is a super nice guy, which made for a very pleasant experience each time.
Moran is honest and trustworthy and I highly recommend him if you need to sell any diamond jewelry.
Mack K.
2/08/2026
It's always a pleasure to work with Moran! He's honest, knowledgeable, personable, and an attentive listener. He's also happy to share his insights about the industry and take his time to educate his customers so they feel comfortable throughout the process. I highly recommend working with Moran!
Shanda H.
2/06/2026
Had such a great experience with Moran. Very fair. No games. Very knowledgeable!
Jackie H.
2/03/2026
MI Trading was an exceptional experience. Moran is professional, courteous, and very knowledgable. I highly recommend this company.
Mari W.
2/03/2026
Moran was an absolute pleasure to work with. It was easy to call and set an appointment. He looked over my items carefully, had deep knowledge of the market, calculated a fair price, and wrote me a check on the spot. I would definitely go here again with other jewelry I'm ready to let go of.
Erin R.
1/28/2026
Moran have us the best price for the items at brought in. He is cordial and professional and I will be returning to MI Trading if I want to sell anything else.
Haydee M.
1/27/2026
M I Trading was an absolute pleasure doing business with. Moran took the time to discuss his industry and made me feel as an equal. Negotiations were very transparent and we had no qualms after discussing our specific concerns. I will seek to do business with him in the future. Highly Recommend!!!
Connie N.
1/23/2026

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