Diamond Price Calculator | Calculate Fair Market Value

How pricing works

What Affects Diamond Price?

Every diamond’s value comes down to four big levers — size and shape, color and clarity, cut and certification, and live market availability. These are the inputs the Diamond Price Calculator uses to estimate how much a diamond is worth today.

Round brilliant diamond shape reference at a small carat weight

Oval diamond shape reference at a medium carat weight

Pear diamond shape reference at a larger carat weight

High impact

Size & Shape

Carat is the single biggest driver — doubling weight roughly quadruples the price at the same quality. Shape stacks on top: rounds carry a 10–30% premium over ovals, cushions, emeralds and pears.

Diamond color grade D to E example - colorless reference visual

vs

Diamond color grade F to G example - near-colorless reference visual

Diamond clarity grade FL example - flawless reference visual

vs

Diamond clarity grade VS1 to VS2 example - eye-clean reference visual

High impact

Color & Clarity

D–E and Flawless command real premiums, but to the naked eye F–G and VS1–VS2 usually look identical once mounted. Stepping down one bracket each typically saves 25–45% combined.

Polished round brilliant diamond illustrating excellent cut quality

GIA Report

CutExcellent
ColorG
ClarityVS2
Carat1.01

✓ Verified

Medium impact

Cut & Certification

Cut quality is what makes a diamond actually sparkle — Excellent or Ideal is non-negotiable. A trusted lab report (GIA or AGS) commands a real premium over EGL or IGI grading because the grades are stricter and more consistent.

Live market ▲ 2.4%

2.1M live listings 50+ retailers

Market dependent

Live Market Availability

Supply, demand and the depth of current listings move prices day-to-day. When inventory for your spec tightens, prices climb; when it deepens, you have more negotiating room. That’s why every estimate here uses live diamond prices, not stale lists.

Carat & price

Diamond Carat Size and Price

Diamond price doesn’t scale linearly with carat — a 2 carat diamond costs roughly four times a 1 carat at the same quality, not twice. That’s because larger rough diamonds are exponentially rarer. The diamond price per carat climbs sharply at every major weight threshold.

0.50 ct

~ $1,400

Entry-point weight

1.00 ct

~ $5,500

Diamond Color Chart and Price Impact

The GIA diamond color chart runs from D (colorless) to Z (light yellow). For engagement-quality stones, the practical range is D–K. The visible difference between adjacent grades is small, but each grade jump moves price meaningfully.

Premium

D–E

Colorless

No visible color. The purest grade - and the rarest.

Highest price. Most of the difference disappears once the stone is mounted.

Sweet spot

F–G

Near-colorless

Looks completely colorless face-up to the naked eye.

Best value for most buyers - typically saves 25–35% vs D–E.

Smart save

H–I

Faint warmth

A very slight warmth, mostly invisible in yellow- or rose-gold settings.

Strong value - usually 40–55% less than D–E at the same clarity.

Budget

J–K

Warm tint

A visible warm tint, best paired with warmer metals.

Lowest price tier - useful for prioritising carat size over color.

Most buyers land on F–G for the best balance of appearance and price. Want the full table? See the live Diamond Price Index.

Clarity & price

Diamond Clarity Chart and Price Impact

The diamond clarity chart grades how free a stone is from inclusions and blemishes. For most buyers the visible difference disappears well before the price difference does — so clarity is the single easiest place to save.

Premium

FL–IF

Flawless

No inclusions or blemishes at 10× magnification.

Significant premium - rarely worth the cost for a mounted stone.

Optional

VVS1–VVS2

Very Very Slight

Inclusions extremely difficult to see even at 10× magnification.

Usually overkill - pays for grades the eye can't see.

Sweet spot

VS1–VS2

Very Slight

Inclusions visible under magnification, eye-clean face-up.

The eye-clean sweet spot - best clarity value for most buyers.

Budget

SI1–SI2

Slightly Included

Inclusions sometimes visible to the naked eye - depends on the individual stone.

Lowest clarity tier - strong value when the inclusions are well-positioned.

VS1–VS2 is the clarity grade most buyers should target — eye-clean, well-priced, widely available. Browse current 1-carat round prices to see the spread in action.

How we calculate

How We Calculate Fair Market Price

Every Fair Market Price on this Diamond Value Calculator is built from live diamond prices - not opinions, not wholesale benchmarks, not stale lists. Here’s exactly what goes into your estimate.

2M+

Diamonds analyzed

Every estimate is grounded in over two million live diamond listings.

50+

Trusted retailers

Prices come from the major consumer-facing vendors people actually buy from.

Hourly

Updated continuously

Inventory and prices refresh every hour, so the estimate matches today’s market.

±

Comparable diamonds

We match your exact shape, carat, color and clarity - not a generic average.

Once we have your matching set, the central price becomes your Fair Market Price, with a low/high range showing how the market currently varies. Quotes inside the range are normal; anything below the low end is a deal worth taking seriously. See the methodology in detail on our Diamond Pricing Research page.

FAQ

Diamond Price Calculator FAQ

How much is a diamond worth?

A diamond's worth depends on its carat, color, clarity, cut, and shape. A 1 carat round at G/VS2 natural sits around $4,500–$6,500; the same spec lab-grown is usually 60–80% less. The fastest way to find your stone's value is to enter its details into the Diamond Price Calculator above.

How is diamond value calculated?

We compare your selected diamond against more than 2 million live retailer listings of the same shape, carat, color and clarity. The central price across those listings becomes the Fair Market Price, with a low/high range showing how the market currently varies.

What is Fair Market Price?

Fair Market Price is the central price comparable diamonds are currently trading for across major retailers. It isn't an asking price — it's a live benchmark drawn from thousands of listings, so you can tell whether any individual quote is reasonable.

What affects diamond price the most?

Carat weight, by a wide margin. Doubling carat roughly quadruples the price at the same quality. After carat, color and clarity each move price about 25–40% per major grade jump, and cut quality controls how sparkly the stone actually looks.

Does color affect diamond price?

Yes. Dropping from D to G typically saves 25–35% at the same carat and clarity - and both grades look colorless face-up once mounted. See the Diamond color chart above for the full breakdown.

Does clarity affect diamond price?

Yes. Flawless commands a steep premium most buyers don't need; VS1–VS2 is the eye-clean sweet spot, and SI1–SI2 can offer strong value when the inclusions are well-positioned. See the Diamond clarity chart above.

Why are round diamonds more expensive?

Two reasons: round still represents more than half of all engagement ring sales, and cutting a round brilliant wastes more of the rough stone than any fancy shape. The result is a 10–30% premium per carat over ovals, cushions, emeralds and pears at equivalent quality.

Is this based on live diamond prices?

Yes. Every estimate is built from live retailer listings refreshed hourly across 50+ trusted vendors - the same prices you'd be quoted shopping today. Wholesale figures like Rapaport are different and not available to consumers.

Related guides

How Much Is a Diamond Worth?

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