While most couples won’t purchase or wear a multi-million dollar engagement ring, few pieces spark inspiration quite like these historically prized gems. Consider the Eternal Pink Diamond featuring a rare 10.57-carat vivid pink stone — which is among the most expensive diamonds in the world — or Grace Kelly’s 10.47-carat, emerald-cut Cartier ring. Both have been the source of fascination and allure for countless engaged couples.
But luxury isn’t out of reach. In fact, obtaining a prized ring is becoming more realistic. According to BriteCo’s Lab-Grown Vs. Natural Diamond Report, customers are leveraging less expensive lab-grown diamonds in order to procure larger, higher-quality rings.
Keep reading to learn more about the 10 most expensive diamond engagement rings, the average engagement ring cost today, and the cost to insure valuable rings by state.
The 5 Most Expensive Diamond Rings in the World
The allure of diamonds stems from their incredible journey, from formation to discovery, to the craftsmanship that makes them shine. However, the true value in diamond rings comes from the rarity, size, and immense clarity of the stone. Explore the effect of this value by learning about some of the most expensive jewelry in the world, including the aforementioned Eternal Pink Diamond Ring and other rare colored gemstones.
1. The Eternal Pink Diamond Ring
- Current Approximate Value: $34.8 million
- Cut: Mixed
- Carats: 10.57
- Clarity: Internally flawless (IF)
- BriteCo’s Estimated Annual Premium Cost: $348,045
The Eternal Pink Diamond Ring features a fancy, vivid, purplish pink stone that is cushioned and mixed-cut. The central diamond is offset on the ring by trapezoid-shaped smaller diamonds.
What sets this gem apart is its natural, vibrant color. While other pink diamonds feature subtle or soft hues, the Eternal Pink Diamond is classified as one of the rarest and most pure gems thanks to its pure and rich color.
2. Fancy Vivid Blue Diamond Ring
- Current Approximate Value: $25.5 million
- Cut: Radiant
- Carats: 11.28
- Clarity: Very slightly included (VS2)
- BriteCo’s Estimated Annual Premium Cost: $254,450
The Fancy Vivid Blue Diamond Ring, also known as The Infinite Blue, features an extremely rare and naturally blue diamond. Its rarity creates exclusivity, as natural blue diamonds are among the most difficult to find.
This natural blue central diamond is offset by brilliant-cut, pink-tinted diamonds and is set in an 18-karat white and pink gold bad. This contrast of color allows the blue diamond to shine.
3. Bulgari Laguna Blu Fancy Vivid Blue Diamond Ring
- Current Approximate Value: $28.5 million
- Cut: Pear
- Carats: 11.16
- Clarity: Very slightly included (VS1)
- BriteCo’s Estimated Annual Premium Cost: $283,623
The Laguna Blu is a vivid blue diamond known for its intense natural color. It’s set between baguette diamonds, making the pear shape the focal point of the ring.
The diamond was originally cut by Bulgari in the 1970s and for nearly 50 years, it was owned by an anonymous European collector until its sale to another unknown buyer in 2023.
Before this more recent sale, the diamond was a featured part of a Bulgari necklace that actress Priyanka Chopra Jonas wore to the 2023 Met Gala.
4. Fancy Intense Pink and Fancy Deep Grayish Blue Diamond Ring
- Current Approximate Value: $13.1 million
- Cut: Cut-cornered rectangular modified brilliant
- Carats: 21.94
- Clarity: Very very slightly included (VVS2)
- BriteCo’s Estimated Annual Premium Cost: $130,087
The Fancy Intense Pink and Fancy Deep Grayish Blue Diamond Ring showcases a brilliant color contrast. At its center is the large, naturally vibrant Fancy Intense Pink diamond, with a series of half-moon-shaped Fancy Deep Grayish Blue diamonds on either side to create the dramatic color gradient.
The colored diamonds are surrounded by brilliant-cut accent diamonds, creating a stunning outline and allowing the hues to appear even more vibrant, further adding to the ring’s allure.
5. Fancy Vivid Purplish Pink Diamond Ring
- Current Approximate Value: $7.1 million
- Cut: Round-cornered rectangular modified brilliant
- Carats: 5.01
- Clarity: Very slightly included (VS2)
- BriteCo’s Estimated Annual Premium Cost: $70,450
The Fancy Vivid Purplish Pink Diamond Ring brings drama and elegance with its intense natural-colored pink diamond and rectangular center stone. The brilliant-cut diamonds surrounding the center stone add to the dramatic effect.
This design allows the rich pink hue to stand out, while the surrounding stones enhance the shine and elegance of the ring.
The 5 Most Expensive Celebrity Engagement Rings
While many of the most expensive diamond rings around the world sell at private auctions, many others appear on the fingers of celebrities and influential figures. These widely-discussed engagement rings worn by the rich and famous often influence trends and make their way into the mainstream.
From iconic royal treasures to modern glam, these are the five most expensive celebrity engagement rings, with all pricing information and ring details sourced from Brides.com:
1. Grace Kelly’s Cartier Ring
- Current Approximate Value: $38.8 million
- Cut: Emerald
- Carats: 10.47
- BriteCo’s Estimated Annual Premium Cost: $388,000
- Current Owner: The House of Grimaldi — royal family of Monaco
Grace Kelly’s Cartier engagement ring, given to her in 1956 by Prince Rainier III of Monaco, is a timeless example of Old Hollywood glamor and is perhaps the most iconic piece of celebrity jewelry.
Cartier designed the ring, which features an emerald-cut diamond and two tapered baguette diamonds on either side.
The actress-turned-princess famously wore her engagement ring in “High Society,” which would be her last film before she assumed full-time royal duties.
2. Jackie Kennedy Onassis’s Harry Winston Lesotho III Ring
- Current Approximate Value: $20 million
- Cut: Marquise
- Carats: 40.42
- BriteCo’s Estimated Annual Premium Cost: $200,000
- Current Owner: Unidentified
Jackie Kennedy Onassis’s Harry Winston Lesotho III ring was given to her in 1968 by her second husband, Aristotle Onassis, a Greek shipping magnate. She reportedly only wore the massive jewel twice in public, choosing to keep it secured most of the time.
The Lesotho III diamond is one of 18 gems cut from a 601-carat rough diamond discovered in 1967 in Lesotho, South Africa. This marquise-cut 40.42-carat diamond is elegantly displayed on a simple platinum band.
After Onassis’s death in 1996, the ring was auctioned in the same year to an unknown buyer.
3. Mariah Carey’s Wilfredo Rosado Ring
- Current Approximate Value: $10 million
- Cut: Emerald
- Carats: 35
- BriteCo’s Estimated Annual Premium Cost: $100,000
- Current Owner: Unidentified
Mariah Carey received the Wilfredo Rosado ring in 2016 from Australian billionaire James Packer. Designer Rosado was a close friend of Carey and personally crafted the ring to create an elegant yet extravagant piece.
The ring makes a statement, featuring a large emerald-cut diamond with twin baguette diamonds on either side. Even though the engagement ended later in 2016, Carey kept the ring for two years before selling it to an undisclosed Los Angeles jeweler.
4. Elizabeth Taylor’s Krupp Diamond Ring
- Current Approximate Value: $8.8 million
- Cut: Asscher
- Carats: 33.19
- BriteCo’s Estimated Annual Premium Cost: $88,000
- Current Owner: Unidentified
Actor Richard Burton gifted his then-wife, Elizabeth Taylor, a Krupp Diamond ring in 1968. It features a large asscher-cut diamond set on a platinum band. Taylor, well-known for her love of glamorous diamonds, wore the ring often throughout her life and referred to it as her favorite piece of jewelry. In fact, it would later become known as the Elizabeth Taylor diamond.
Burton originally purchased the piece from the estate of Vera Krupp, a German actress. After Taylor’s death in 2011, her estate sold the ring and many other of her famous pieces at auction, with proceeds benefitting the Elizabeth Taylor AIDS Foundation.
5. Anna Kournikova’s Yellow Diamond Ring
- Current Approximate Value: $7.7 million
- Cut: Radiant
- Carats: 11
- BriteCo’s Estimated Annual Premium Cost: $77,000
- Current Owner: Anna Kournikova
Not much is known about Anna Kournikova’s Yellow Diamond ring, which was gifted by her musician partner Enrique Iglesias in 2009. The couple has notoriously kept details of their relationship private, including information about the ring.
What is known is that the design features a naturally-colored, radiant-cut yellow diamond, and the rare and vibrant stone is set on a platinum band.
What Makes an Engagement Ring Valuable?
When determining an engagement ring’s value, it’s not just market price but also sentimental value that’s an important factor. Sentimental value carries the emotional significance of a ring and its associated memories or stories. No matter how the ring is crafted, sentimental value can make it priceless to those who wear it.
On the other hand, market value defines how much money a ring is worth based on key factors like gemstone composition, rarity, and craftsmanship. For example, if your engagement ring has a round brilliant cut diamond, which is the most expensive diamond cut, it’ll have a higher market value.
The difference is that sentimental value is subjective, whereas market value is definitive and essential for insurance, estate planning, or resale. The most expensive diamond or engagement rings have one thing in common: optimal market value. These are the key factors that help determine the overall dollar figure.
| Value Driver | Explanation | Examples |
| The 4Cs (i.e., cut, clarity, color, and carat) | The technical characteristics of the gemstone, including cut quality, clarity grade, color, and carat weight, directly influence brilliance and rarity. | The Gemological Institute of America (GIA) Clarity Scale provides a global language to describe a diamond’s grade. |
| Gemstone rarity | Rare or naturally-colored gemstones are more valuable due to scarcity and desirability. | Natural-colored diamonds, in hues of pink, blue, and yellow, are less likely to be discovered than clear diamonds, which gives them more market value. |
| Designer or craftsman | Rings by renowned designers or luxury brands command premium value because of brand reputation, craftsmanship, and exclusivity. | The most expensive jewelry brands include famous names like Harry Winston, Cartier, and Tiffany & Co. |
Average White Diamond Engagement Ring Cost by State
According to BriteCo’s data, the average engagement ring cost in the US in 2025 is $6,504. While this information can help couples budget when planning a proposal, it’s important to remember that actual costs will vary from state to state depending on the ring you choose. (Engagement ring laws by state also vary, so if your engagement ends, it’s important to know who legally keeps the ring.)
For example, metropolitan areas with a high concentration of luxury retailers often see higher average prices, while smaller cities or regions with fewer jewelers may have lower averages. An engagement ring cost will also be determined by the gemstone you choose and the retailer where you purchase it.
Average Cost to Insure a White Diamond Engagement Ring by State
Insuring an engagement ring helps protect both its sentimental and market value from theft, loss, or accidental damage. Whether your ring’s value rivals that of the most expensive engagement ring or is closer to the average cost of a ring in your state, jewelry insurance provides critical peace of mind.
Unlike basic coverage found in most homeowners or renters policies, specialized jewelry insurance covers common mishaps like accidental loss, mysterious disappearance, and damage that may occur while traveling or simply wearing the ring every day. This comprehensive coverage ensures you can have your ring repaired or replaced, securing your financial and emotional investment.
The great news is that protecting an engagement ring closer to the national average is affordable. While the most expensive diamonds carry massive premiums, most engagement ring insurance policies cost around 2-5% of the ring’s value annually. BriteCo carries the added perk of extended insurance coverage for multiple people, meaning your ring is covered by both the person who bought it and the person who wears it.
Compare the average cost of jewelry insurance to the average cost of a white diamond engagement ring in each state, based on information from BriteCo and it’s clear how valuable — and affordable — coverage really is.
| State | Average Cost of a White Diamond Engagement Ring | Average Engagement Ring Insurance Premium |
| Alabama | $10,783 | $108.76 |
| Alaska | $9,345 | $101.27 |
| Arizona | $12,529 | $154.43 |
| Arkansas | $10,005 | $108.36 |
| California | $14,333 | $209.61 |
| Colorado | $11,435 | $121.71 |
| Connecticut | $11,674 | $116.64 |
| Delaware | $11,028 | $113.29 |
| Florida | $13,025 | $187.09 |
| Georgia | $12,047 | $145.07 |
| Hawaii | $12,061 | $158.54 |
| Idaho | $9,604 | $93.27 |
| Illinois | $12,985 | $135.79 |
| Indiana | $8,969 | $89.61 |
| Iowa | $7,643 | $71.33 |
| Kansas | $8,988 | $91.44 |
| Kentucky | $8,727 | $88.85 |
| Louisiana | $10,907 | $112.05 |
| Maine | $9,723 | $90.80 |
| Maryland | $12,414 | $130.98 |
| Massachusetts | $13,285 | $138.92 |
| Michigan | $10,776 | $119.72 |
| Minnesota | $8,708 | $81.33 |
| Mississippi | $9,637 | $100.76 |
| Missouri | $9,364 | $101.43 |
| Montana | $8,155 | $79.24 |
| Nebraska | $10,491 | $97.95 |
| Nevada | $15,115 | $215.99 |
| New Hampshire | $9,955 | $92.95 |
| New Jersey | $14,305 | $154.93 |
| New Mexico | $10,321 | $124.36 |
| New York | $15,381 | $207.33 |
| North Carolina | $10,095 | $105.56 |
| North Dakota | $5,893 | $56.14 |
| Ohio | $9,147 | $87.09 |
| Oklahoma | $11,918 | $144.62 |
| Oregon | $9,613 | $95.16 |
| Pennsylvania | $10,524 | $108.10 |
| Rhode Island | $11,778 | $128.63 |
| South Carolina | $10,637 | $112.21 |
| South Dakota | $7,837 | $73.15 |
| Tennessee | $9,779 | $111.41 |
| Texas | $13,067 | $163.46 |
| Utah | $8,649 | $95.24 |
| Vermont | $7,402 | $69.14 |
| Virginia | $11,246 | $110.24 |
| Washington | $11,930 | $133.19 |
| West Virginia | $11,449 | $106.90 |
| Wisconsin | $8,728 | $87.22 |
| Wyoming | $7,939 | $74.88 |
Most Expensive Engagement Ring FAQs
How Much Is an Engagement Ring?
According to BriteCo data, the average cost of an engagement ring is $6,504 in 2025. However, your cost will vary depending on several factors, including where you live, the gemstone quality, whether the stone is lab-grown or natural, and the retailer where you purchase it.
Who Owns the Most Expensive Engagement Ring?
The owner of the most expensive engagement ring — The Eternal Pink Diamond Ring ($34.8 million current value) — isn’t known. It was sold at auction to an unidentified buyer. However, Grace Kelly’s Cartier ring, the most expensive celebrity engagement ring with a current value of $38.8 million, is still owned by Monaco’s royal family, the Grimaldis.
Why Are Diamonds So Expensive?
Natural diamonds are expensive due to their rarity, craftsmanship, and cultural significance. Natural diamonds take millions of years to form and cost a significant amount of money to mine. However, the luxurious status symbol associated with diamonds is also a large driver of their cost.
From Million-Dollar Gems to Everyday Heirlooms, Protect Your Engagement Ring with BriteCo
Whether you’re fascinated with the composition and story behind the most expensive engagement ring or are searching for one that feels priceless to you, every ring carries financial and sentimental value worth protecting. From rare-colored diamonds to classic solitaires, engagement rings deserve the same care and security as any treasured investment.
No matter your budget, insuring an engagement ring is a smart way to safeguard its value against loss, theft, or damage. BriteCo makes getting coverage that fits your needs fast, affordable, and stress-free. Protect your love story today — get a free quote in minutes and enjoy peace of mind knowing your ring is covered for a lifetime of memories.
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