How much is 14 Carat Natural Diamond? Where to Buy Reputably?

14 carat diamonds belong to the super-rare group and have special value in the jewelry industry. With large weight, outstanding size, and scarce rarity, each 14-carat diamond is not only considered a luxury jewel but also a legacy investment asset. 

In this article, diamond expert Jemmia will join you in exploring the details of size, weight, actual value, and reputable places to buy 14-carat diamonds.

Convert 14 carat to ly, gram?

A 14-carat diamond is an extremely rare size. For easy visualization, according to GIA international standards:

1 carat = 0.2 grams → 14 carats = 2.8 grams.

For the common Round Brilliant cut, a 14-carat diamond usually has a diameter of about 15-16 ly.

For other cuts, the actual size will vary:

• Emerald cut: about 16 × 12 ly
• Oval cut: about 18-19 × 13-14.5 ly
• Radiant cut: about 16 × 12 ly
• Heart cut: about 15.5-16.5 ly

Thus, with the same weight of 14 carats, depending on the cut, the diamond may appear larger or smaller to the naked eye. This is why in valuation, carat is only one factor; the cut proportions and shape also strongly influence the perceived size and actual value of the diamond.

14-carat diamonds are classified as extremely rare, usually found only in high-end jewelry collections and international auctions.

How much does a 14-carat diamond cost?

14-carat diamonds are considered among the rarest and most expensive sizes on the market. According to the Diamond Price Index® (2025), the average price of natural diamonds from 5 carats and above is around 21,997 USD/carat.

Applying this price, a 14-carat diamond would have an estimated price of: 14 × 21,997 ≈ 308,000 USD (approximately 7.8 billion VND).

However, in reality, the price can range from 350,000 USD to over 750,000 USD, depending on the factors:

• Color: D color (colorless) is always significantly higher than lower grades.
• Clarity: VVS or IF, which are nearly flawless, are exceptionally valuable.
• Cut: An Excellent Cut makes the stone fiery, greatly increasing its value.
• Certification: Diamonds with GIA certification always hold their value better.

For diamonds of perfect quality (D color, VVS/IF, Excellent Cut), the value can even exceed 1.5 million USD at international auctions.

Refer to: Natural diamond prices with attractive offers at Jemmia Diamond

How much does a 14-carat diamond ring cost?

When crafted into a ring, the value of a 14-carat diamond will be significantly higher due to design and brand manufacturing costs.

Influencing factors:

• The quality of the 4Cs of the main stone.
• Ring style (Solitaire, Halo, Three-stone…).
• Material (18K gold, 14K gold, small diamonds).
• Manufacturing brand, degree of uniqueness.

In the market, 14-carat diamond rings usually cost from 500,000 USD to over 1.8 million USD, depending on quality and brand. For bespoke designs from renowned jewelers, the price can far exceed 2 million USD.

See more: Elegant and exquisite diamond rings at Jemmia Diamond 

A 14-carat diamond ring can

Where to buy reputable and quality diamonds?

Diamonds are valuable assets, so when purchasing, transparency and international standard certification are required. Jemmia Diamond is proud to be a reputable and transparent diamond retailer in Vietnam: 

• Diamonds at Jemmia Diamond are 100% officially imported with full invoices and GIA certificates.
• We select only the top 2% of the world's most beautiful diamonds according to strict 4Cs standards. We completely eliminate diamonds with flaws that affect durability and structure. 
• Equipped with the most modern inspection equipment from GIA USA: GIA iD100, GIA Diamond Dock, GIA Match iD… for customers to verify directly.
• Diamonds are imported from transparent sources, adhering to the Kimberley Process.
• Public and transparent price list, easy to look up and choose a diamond that suits your needs and budget. 
• Competitive buy-back and exchange policy in the market, helping to preserve investment value.

14-carat diamonds are rare masterpieces, possessing both top-tier aesthetic value and being a stable investment asset. This product line is exclusively for the super-rich and collectors. To ensure you purchase quality, transparent, and internationally certified 14-carat diamonds, it is advisable to choose a reputable brand. 

📞 Contact 0838 353 333 or Zalo Jemmia Diamond to be advised by experts on diamonds suitable for your needs and budget.