The diamond price in 2026 is subject to significant fluctuations related to international markets, Asian demand, and the emergence of lab-grown diamonds. At Diamantaires Paris OG, we monitor these developments daily to guarantee you the best price when appraising and buying your stones. This page provides you with up-to-date prices, market trends, and the key factors for understanding the value of your diamond.

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What is the current diamond price in 2026?

Diamonds do not have a single official quotation like gold or silver. Their price is determined by several reference indices, including the Rapaport Diamond Report, a weekly global reference publication used by all professionals. This report establishes wholesale prices in US dollars per carat, segmented by weight, color, clarity, and cut shape.

In 2026, prices vary considerably according to four fundamental criteria, known as the 4Cs:

Carat (weight): expressed in carats (1 carat = 0.20 grams). The price per carat increases exponentially with weight.
Color: from D (exceptional white, the rarest) to Z (tinted yellow). Grades D to F command a significant premium.
Clarity: from IF (Internally Flawless) to I3 (inclusions very visible to the naked eye).
Cut: the quality of the cut influences brilliance. An "Excellent" cut is worth 20 to 40% more than a "Good" cut.

Indicative diamond prices per carat in 2026

The table below shows resale price ranges for certified natural diamonds in round brilliant cut. These values are estimates based on current professional market prices.

Weight	Standard quality (G-H, VS)	Good quality (E-F, VVS)	High quality (D-E, IF-VVS1)
0.30 carat	€600 – €1,200	€1,000 – €2,000	€1,500 – €3,000
0.50 carat	€1,500 – €2,500	€2,500 – €4,000	€3,000 – €5,000
0.70 carat	€2,500 – €4,000	€4,000 – €6,500	€5,500 – €9,000
1 carat	€4,000 – €7,000	€7,000 – €12,000	€8,000 – €18,000
1.50 carats	€7,000 – €13,000	€12,000 – €22,000	€18,000 – €35,000
2 carats	€12,000 – €22,000	€20,000 – €40,000	€25,000 – €60,000
3 carats	€25,000 – €45,000	€40,000 – €80,000	€50,000 – €120,000
5 carats and up	€60,000 – €120,000	€100,000 – €250,000	€150,000 – €500,000+

These prices are indicative and correspond to natural round brilliant diamonds. The actual value depends on the precise 4Cs of your stone, the presence of a GIA certificate, and market conditions at the time of sale.

Price by diamond cut shape

The cut shape directly influences the resale price. The round brilliant cut is the most sought-after and commands the highest prices. Other shapes, known as "fancy shapes," typically trade at a discount of 10% to 30% compared to the round cut.

Cut shape	Premium/Discount vs. Round	Secondary market demand
Round brilliant	Reference (highest price)	Very strong — the most liquid
Cushion	-10% to -15%	Strong, very trendy since 2020
Oval	-10% to -20%	Strong, popular for engagement rings
Princess (square)	-15% to -25%	Average, less sought-after than before
Emerald	-15% to -25%	Stable, appreciated in high-end jewelry
Pear (drop)	-15% to -25%	Medium to strong depending on size
Marquise	-20% to -30%	Low, considered vintage
Asscher	-20% to -30%	Niche, appreciated by connoisseurs
Radiant	-15% to -20%	Growing, good sparkle/price compromise

How does the Rapaport Diamond Report work?

The Rapaport Diamond Report, published every Thursday by Martin Rapaport since 1978, is the global reference for diamond pricing. It is a wholesale price list in US dollars per carat for GIA-certified round brilliant diamonds. The grid is organized by:

Weight: 0.01 to 10.99 carats, with brackets (0.30-0.39 ct, 0.40-0.49 ct, 0.50-0.69 ct, 0.70-0.89 ct, 0.90-0.99 ct, 1.00-1.49 ct, etc.)
Color: D to M, in columns
Clarity: IF to I3, in rows

Rapaport prices are indicative wholesale prices. Actual transactions occur "above" or "below" Rap, expressed as a percentage discount or premium. For example, a diamond traded at "Rap -15%" means it sells 15% below the listed Rapaport price. In periods of high demand, rare stones (D-IF above 2 carats) can trade above Rap.

Factors influencing the diamond price in 2026

Global demand

China and India account for over 50% of global diamond consumption. The United States remains the largest market, with approximately 45% of worldwide jewelry diamond sales. An economic slowdown in these countries directly impacts prices. In 2026, the economic recovery in Asia supports prices of higher-quality stones (1 carat and above, color D-G).

Impact of lab-grown diamonds

The rise of lab-grown diamonds (produced by CVD and HPHT methods) has profoundly changed the market since 2020. Prices of lab-grown diamonds have fallen by more than 70%, making these stones very accessible. For natural diamonds, the impact varies by size:

Under 0.50 carat: a 30% to 50% drop in natural prices, strong competition from synthetics
0.50 to 1 carat: a 15% to 25% drop, the market stabilizes
1 to 2 carats: a moderate drop of 5% to 15%, buyers still prefer natural
Over 2 carats: little or no impact, large natural diamonds remain rare and sought-after

To learn more about the distinction between the two types of stones, see our article natural diamond vs. lab-grown diamond.

Gold price and precious metals

Although diamond and gold are separate markets, the historic rise in the gold price in 2025-2026 has an indirect positive effect. Investors seeking safe-haven assets are more interested in tangible assets, supporting interest in investment-grade diamonds of exceptional quality.

GIA certification

A GIA-certified diamond trades at a premium of 10% to 30% compared to an uncertified stone of equivalent quality. The Gemological Institute of America certificate is globally recognized and guarantees the objectivity of the assessment. It is the essential standard for high-value diamond transactions.

Diamond price evolution: trends 2024-2026

After two years of correction (2023-2024), the natural diamond market shows signs of stabilization in 2026. Here are the major trends observed:

Small stones (< 0.50 ct): prices remain under pressure due to competition from synthetics. This segment represents the largest volume of transactions but with reduced margins.
Medium stones (0.50-1.50 ct): stabilization after a 15-20% decline. Demand for engagement rings supports this segment.
Large stones (2 ct +): prices hold steady or rise slightly, driven by rarity and collector demand.
Fancy color diamonds (fancy yellow, pink, blue): prices continue to rise, especially for pink stones after the closure of the Argyle mine in 2020.

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When is the right time to sell a diamond?

There is no universal "best time" to sell a diamond, but certain factors can work in your favor:

High gold price: when gold is high, diamond jewelry also benefits from better overall valuation.
Strong seasonal demand: periods leading up to Christmas, Valentine's Day, and the wedding season (May-September) see increased demand.
Having a GIA certificate: if your diamond is not certified, we can assess whether it is worthwhile to certify it before selling (for stones over 1 carat, this is often profitable).
Stable or rising market: in 2026, the market for stones over 1 carat is favorable to sellers.

How to get your diamond appraised at Diamantaire Paris?

Our team of GIA-trained gemologists offers a free and confidential appraisal. The process is simple and quick:

Contact us: call 01 48 87 23 37 or send photos via WhatsApp. We give you a preliminary indicative estimate.
In-person appraisal: our gemologist analyzes your diamond with a 10x loupe, measures its proportions with a Leveridge gauge, checks UV fluorescence, and evaluates the 4Cs.
Purchase offer: we present a price based on the current Rapaport price, with a detailed explanation of each criterion.
Immediate payment: if you accept, payment the same day by instant wire transfer, bank check, or cash (legal limit of €3,000).

We buy all types of diamonds: stones set in jewelry, certified or uncertified loose diamonds, inheritance diamonds, investment diamonds, and professional diamond lots.

Frequently asked questions about diamond pricing

Is a diamond a good investment in 2026?

A diamond is not a financial asset in the classic sense: there is no stock market quotation, no dividend, and liquidity is limited. However, diamonds of exceptional quality (from 2 carats, color D-F, clarity IF-VVS1, GIA certified) have historically maintained or increased in value over the long term. They are a tangible, portable, and discreet asset that can complement a diversified portfolio.

Why is the resale price of a diamond lower than the purchase price?

The retail price in jewelry stores includes many costs: jewelry manufacturing, retailer margin (often 100% to 300%), VAT (20%), marketing, and boutique rent. When reselling, the value is based solely on the stone and precious metal, without these surcharges. This is why a diamond purchased for €10,000 at a jeweler may have a resale value of €3,000 to €6,000 depending on its quality.

Does an uncertified diamond have value?

Yes, an uncertified diamond retains intrinsic value based on its actual characteristics. Our gemologists evaluate each stone using the same criteria as the GIA. However, the absence of a certificate generally results in a discount of 10% to 30%, as the buyer must rely solely on our expertise. For diamonds over 1 carat, we may recommend certification before sale if it significantly increases their value. To learn more, see our guide selling a GIA-certified diamond.

Do lab-grown diamonds lower the value of natural diamonds?

The impact is real but variable. Small natural diamonds (under 1 carat) face the strongest competition from synthetics, with declines of 30% to 50% since 2020. In contrast, natural diamonds over 2 carats are little affected: their natural rarity and heritage value clearly distinguish them from lab-grown stones. In 2026, the market seems to have found a new equilibrium, with a clear segmentation between the two types of stones.

How can I tell if my diamond is natural or synthetic?

It is impossible to distinguish a natural diamond from a synthetic one with the naked eye or a loupe. Only specialized instruments (spectroscopy, advanced fluorescence) can differentiate them. If your diamond has a GIA or HRD certificate, it always indicates the origin (natural or lab). Without a certificate, our gemologists have the necessary equipment to perform this verification in our showroom. See our article natural diamond vs. lab-grown diamond for more information.

Where to track diamond prices?

The main sources for tracking diamond price trends are:

Rapaport Diamond Report (paid, for professionals only): the global reference
IDEX Online: professional trading platform with price indices
Diamantaires Paris: we publish updated estimates and provide price ranges free of charge during our appraisals

Visit our showroom in the heart of Paris

Our showroom welcomes you in a confidential and secure setting at 43 Rue Beaubourg in the Marais district (Paris 3rd). A few minutes from the Centre Pompidou and Place Vendôme, we are easily accessible by public transport.

Address: 43 Rue Beaubourg, 75003 Paris
Hours: Monday to Saturday, 9am – 7pm (non-stop)
Metro: Rambuteau (line 11) or Arts et Métiers (lines 3 and 11)
Phone: 01 48 87 23 37

You can come without an appointment for a free and no-obligation estimate. For high-value diamonds (over 2 carats), a prior call allows our specialized gemologist to devote their full attention to you.

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Diamond Price in 2026: Current Price per Carat and Evolution