Last Updated: May 2026
Lab Grown Diamond Price Calculator
Our Lab-Grown Diamond Price Calculator estimates the retail price of a loose lab-grown diamond based on carat weight, shape, color, clarity, cut, and certification. Compare your estimate with market benchmarks, understand the factors that affect diamond prices, and explore diamonds that match your budget. All estimates are indicative and may differ from actual retailer listings.
Lab Grown Diamond Price Calculator
Estimate an indicative retail price for a loose lab-grown diamond by carat, shape, color, clarity, cut, and certification.
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Certification is only an illustrative model input here; a grading report does not guarantee a fixed price premium.
Estimated Price Per Carat
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Estimated Diamond Price
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Estimate Basis
Market index + model adjustments
This is an indicative model estimate based on published market reference indexes and illustrative adjustment factors. It is not a live quote for a specific stone, a formal appraisal, or a resale valuation.
Why This Price?
Shape
Carat Weight
Color, Clarity, Cut & Certification
Illustrative Price Range
The range shown is calculated from 70% to 135% of this model estimate. It is an illustrative comparison band, not a live listing range or a statistical market confidence interval. Actual listings may fall outside it.
Lab Grown Diamond Price by Carat
| Carat | Market Reference Index | Reference |
|---|
Market reference snapshot dated October 22, 2026. Source: StoneAlgo Lab Grown Diamond Prices. Index values are based on tracked online listings and can change over time. They are market benchmarks, not guaranteed prices for an individual diamond. The calculator applies additional illustrative model factors to the selected inputs.
How Much Is a Lab Grown Diamond Worth?
Lab-grown diamond prices vary by carat weight, shape, color, clarity, cut, seller, and the specifications of the individual stone. Market indexes provide a useful benchmark, but they do not guarantee the price of a particular diamond.
Use the calculator to compare an indicative estimate for different combinations of carat, shape, color, clarity, cut, and certification. Before purchasing, compare actual listings with similar specifications and verify the grading report.
Compare Lab Grown Diamonds Within Your Budget
This calculator does not query live inventory or verify that a specific product matches your selections. Use the inventory page to compare actual listings, specifications, and prices.
Browse Lab Grown DiamondsDiamond Price Estimator by Carat
Diamond prices vary significantly by carat weight. Use our diamond price estimator by carat to understand the estimated value range of lab grown diamonds from 1 carat to 5 carats. Final prices are also affected by color, clarity, cut quality, and certification.
How to Calculate Diamond Price or Value
Diamond prices are determined by several key factors, including carat, color, clarity, cut, and certification. Use the sections below to understand how each factor affects the final price.
Carat (Weight)
Carat measures a diamond’s weight, with one carat equal to 0.2 grams. As carat weight increases, the total diamond price generally rises, but price per carat can vary based on shape, color, clarity, cut quality, and market availability. Two diamonds with the same carat weight can have significantly different prices.
Cut & Proportions
Cut quality and proportions influence how effectively a diamond reflects and returns light. A well-cut diamond can display greater brightness, fire, and scintillation, while poor proportions may reduce its visual performance. When comparing diamonds, consider cut quality alongside carat weight, color, and clarity rather than evaluating price alone.
Color
Diamond color is graded from D (colorless) to Z (noticeable color). For buyers seeking a balance between color appearance and price, G–H diamonds are often considered a practical range, although the preferred grade depends on the diamond’s shape, setting, and personal preference.
Clarity
Diamond clarity describes internal inclusions and external blemishes. VS1 and VS2 diamonds can offer a balance between appearance and price, but eye-clean appearance varies by individual stone. Inspecting the actual diamond, including its inclusions and their locations, is more useful than relying on the clarity grade alone.
Certification
A diamond grading report documents characteristics such as carat weight, color, clarity, and cut. Reports from recognized gemological laboratories, including IGI and GIA (Gemological Institute of America), help buyers compare diamonds with greater confidence. Certification does not guarantee a particular retail price or resale value, so the diamond’s specifications and actual market listings should also be considered.
Lab Diamond Price Chart
Lab-Grown Diamond Price Chart
| Diamond Size | Market Reference Price | Estimated Price Range | Explore |
|---|---|---|---|
| 1 Carat Lab Grown Diamond | $504 | $386–$743 | Explore 1 Carat Diamonds |
| 1.5 Carat Lab Grown Diamond | $716 | $548–$1,056 | Browse Diamond Inventory |
| 2 Carat Lab Grown Diamond | $1,016 | $777–$1,499 | Browse Diamond Inventory |
| 2.5 Carat Lab Grown Diamond | $1,200 | $918–$1,770 | Explore 2.5 Carat Diamonds |
| 3 Carat Lab Grown Diamond | $1,535 | $1,174–$2,264 | Browse Diamond Inventory |
| 4 Carat Lab Grown Diamond | $2,009 | $1,537–$2,964 | Explore 4 Carat Diamonds |
| 5 Carat Lab Grown Diamond | $2,060 | $1,576–$3,039 | Explore 5 Carat Diamonds |
Market reference prices are based on the StoneAlgo Lab Grown Diamond Price Index , using the October 22, 2026 snapshot. Estimated price ranges use the calculator's default settings (Round, F color, VVS2 clarity, Ideal cut, and IGI certification) and an illustrative 70%–135% adjustment band. These figures are estimates for loose lab-grown diamonds, not live quotations or ring prices. Actual prices vary by individual diamond, retailer, and market conditions.
Learn more about:
Diamond Carat & Size
Compare diamond carat weights and millimeter sizes across different
shapes to understand how size affects appearance and price.
View Carat Guide →
Diamond Color
Understand the D–Z color scale and compare color grades to find the
right balance between appearance and price.
View Color Guide →
Diamond Clarity
Learn how inclusions affect diamond appearance and compare VS, VVS,
and SI clarity grades.
View Clarity Guide →
Diamond Cut
Learn how cut quality and proportions affect light performance,
brightness, fire, and overall appearance.
View Cut Guide →
Diamond Certification
Understand diamond grading reports and compare certification from
laboratories such as IGI and GIA.
View Certification Guide →
Diamond Shapes
Compare popular diamond shapes and discover how shape can affect
appearance, proportions, availability, and price.
Explore Diamond Shapes →
Lab Grown vs Natural
Compare the key physical, optical, production, and pricing
differences between lab grown and natural diamonds.
View Comparison →
G Color Diamond
Explore G color diamonds and compare their appearance with other
near-colorless grades.
View G Color Guide →
VS1 vs VS2 Clarity
Compare VS1 and VS2 clarity and understand how clarity differences
can affect appearance and price.
View Comparison →
Frequently Asked Questions
How accurate is the diamond price calculator?
Our Lab-Grown Diamond Price Calculator provides an indicative retail price estimate based on market reference data and selected diamond characteristics, including carat weight, shape, color, clarity, cut, and certification. The estimated price range is model-based and is not a live market quotation or a guarantee of actual retail prices. Prices may vary by retailer, diamond specifications, availability, and market conditions. Use the estimate as a starting point when comparing loose lab-grown diamonds.
How much is a 1 carat lab grown diamond?
The market reference price listed on this page for a 1-carat lab-grown diamond is $504, with an indicative estimated price range of $386–$743 under the calculator’s default assumptions. Actual prices depend on the diamond’s shape, color, clarity, cut, certification, and retailer. These estimates refer to loose diamonds, excluding ring settings.
How much is a 2 carat lab grown diamond?
The market reference price listed on this page for a 2-carat lab-grown diamond is $1,016, with an indicative estimated price range of $777–$1,499 under the calculator’s default assumptions. Individual diamonds may fall outside this range depending on their specifications, retailer, and availability. Use the calculator to compare different combinations of shape, color, clarity, cut, and certification.
Why are lab grown diamonds cheaper than natural diamonds?
Lab-grown diamonds are produced in controlled laboratory environments and have essentially the same chemical composition, crystal structure, and optical properties as natural diamonds. However, their origins differ. Advances in production technology and increased supply have generally made lab-grown diamonds more affordable than comparable natural diamonds.
Does diamond certification affect value?
A diamond grading report documents characteristics such as carat weight, color, clarity, and, where applicable, cut. Reports from recognized gemological laboratories such as IGI and GIA can help buyers verify a diamond’s reported characteristics and compare stones more confidently. Certification does not guarantee a higher selling price or resale value, which also depends on the diamond itself and market conditions.
What is the best diamond clarity for value?
For many buyers, VS1 and VS2 clarity grades can offer a good balance between appearance and price. Some diamonds in these grades appear eye-clean, meaning inclusions are not readily visible to the naked eye. However, eye-clean appearance varies by individual stone, so reviewing the actual diamond is important before purchasing.
Can I resell a lab grown diamond?
Lab-grown diamonds can be resold, but their resale prices may be substantially lower than their original retail prices. Resale value depends on current market conditions, the diamond’s specifications, its documentation, and buyer demand. A grading report from a recognized laboratory such as IGI or GIA can help establish the diamond’s characteristics, but it does not guarantee a particular resale price.