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Lab Grown Diamond Price Calculator
Find the price of an IGI certified lab grown diamond by shape, carat, color and clarity, and see the matching diamond from our collection. A 1 carat round lab grown diamond costs $279 to $309, a 2 carat $549 to $919 and a 3 carat $839 to $1,699, depending on color and clarity.
Diamond price calculator
Lab grown diamond price chart by carat
Prices for IGI certified round lab grown diamonds in D–F color and VVS1–VS2 clarity. The range runs from F color, VS2 clarity (lowest) to D color, VVS1 clarity (highest).
| Carat | Price range | From, per carat | Size |
|---|---|---|---|
| 1 ct | $279 – $309 | $279 | 6.4 mm |
| 1.5 ct | $399 – $609 | $266 | 7.4 mm |
| 2 ct | $549 – $919 | $274 | 8.1 mm |
| 2.5 ct | $689 – $1,149 | $276 | 8.7 mm |
| 3 ct | $839 – $1,699 | $280 | 9.3 mm |
| 3.5 ct | $1,029 – $2,719 | $294 | 9.7 mm |
| 4 ct | $1,119 – $3,659 | $280 | 10.2 mm |
| 4.5 ct | $1,369 – $4,139 | $304 | 10.6 mm |
| 5 ct | $1,469 – $4,199 | $294 | 11.0 mm |
| 6 ct | $1,849 – $5,289 | $308 | 11.6 mm |
| 7 ct | $2,159 – $6,169 | $308 | 12.2 mm |
| 8 ct | $2,469 – $7,049 | $309 | 12.8 mm |
| 9 ct | $2,779 – $7,929 | $309 | 13.3 mm |
| 10 ct | $3,089 – $8,809 | $309 | 13.8 mm |
Lab grown diamond price by shape
Starting prices for each shape at popular carat weights. Click a shape to browse every diamond in that cut.
| Shape | 1 ct from | 2 ct from | 3 ct from | 5 ct from |
|---|---|---|---|---|
| Round | $279 | $549 | $839 | $1,469 |
| Oval | $289 | $609 | $939 | $1,619 |
| Cushion | $289 | $599 | $879 | $1,579 |
| Emerald | $279 | $549 | $759 | $1,289 |
| Pear | $239 | $569 | $889 | $1,399 |
| Radiant | $269 | $569 | $839 | $1,499 |
| Princess | $289 | $599 | $879 | $1,579 |
| Marquise | $299 | $699 | $959 | $1,639 |
| Asscher | $299 | $579 | $799 | $1,359 |
| Heart | $259 | $599 | $929 | $1,469 |
Snapshot of Grown Leo listing prices on October 14, 2026. The calculator above always shows the live price.
What affects lab grown diamond prices
- Carat weight: the biggest price factor. See how each weight looks in mm with our diamond size chart.
- Color: D is the highest (colorless) grade, followed by E and F. All three look colorless face-up to most people.
- Clarity: VVS1 and VVS2 have very, very slight inclusions; VS1 and VS2 have very slight inclusions that are typically not visible to the naked eye.
- Shape: starting prices differ by cut; elongated shapes such as oval and pear can look larger for their weight.
- Certification: every diamond in this calculator comes with an IGI grading report.
Ready to choose a setting? Browse lab grown diamond engagement rings, all loose lab grown diamonds, or popular sizes: 1 carat, 2 carat and 3 carat. Need your ring size? Use our ring size converter.
Diamond price FAQs
How much does a 1 carat lab grown diamond cost?
At Grown Leo, an IGI certified 1 carat round lab grown diamond costs $279 to $309, depending on color (D–F) and clarity (VVS1–VS2). Other 1 carat shapes start from $239. Use the calculator above to see the live price of any shape and grade.
How much does a 2 carat lab grown diamond cost?
An IGI certified 2 carat round lab grown diamond at Grown Leo costs $549 to $919. A 2 carat round starts from $549, the lowest starting price of any shape at that weight.
How much does a 3 carat lab grown diamond cost?
An IGI certified 3 carat round lab grown diamond at Grown Leo costs $839 to $1,699, and a 5 carat round costs $1,469 to $4,199.
What affects the price of a lab grown diamond?
Carat weight has the biggest effect, followed by color and clarity: a D color, VVS1 diamond costs more than an F color, VS2 diamond of the same size. Shape also changes the price, and certified diamonds with a grading report from a lab such as IGI give you an independent record of those grades.
Which diamond shape is the cheapest?
In our current listings the pear shape has the lowest 1 carat starting price ($239), and at 2 carats the round starts lowest ($549). Prices change with color and clarity, so compare grades in the calculator.
Are these prices for loose diamonds or finished rings?
The calculator shows prices for IGI certified loose lab grown diamonds. The setting is priced separately; you can pair any diamond with one of our lab grown diamond engagement ring settings.
How accurate is the diamond price calculator?
The calculator reads the live price of the matching Grown Leo listing when you click Calculate, so the price you see is the current price of that diamond. The price charts on this page are a snapshot taken on October 14, 2026.
What carat sizes and shapes can I calculate?
You can price IGI certified lab grown diamonds from 1 to 10 carats in 10 shapes (round, oval, cushion, emerald, pear, radiant, princess, marquise, asscher and heart), in D, E or F color and VVS1, VVS2, VS1 or VS2 clarity.