Radiant|Lab Grown|IGI

2.57ct F IF Radiant Lab Grown Diamond

EX • F/IF • IGI LG840652908

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG840652908

Diamond specifications and retailer prices

From $501 USD

As of November 1, 2026

Save $3,479 USD (87%) vs most expensive(unlock to see where)

16 retailers carry this diamond

Most expensive: $4,170 USD at Rare Carat · As of October 21, 2026

View at Rare Carat

About this 2.57ct lab-grown radiant diamond

This 2.57ct lab-grown radiant sits in the two to three carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840652908 or 840652908. Listed at 16 retailers as of November 1, 2026, with a 694% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

2.57

Carat

Color

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle40.3°

Pavilion angle36.8°

OriginLab Grown

Grading LabIGI

CertificateIGI LG840652908

Dimensions8.94 × 7.22 × 4.75 mm

L/W Ratio1.24

Cert comments

As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG840652908

Side View

Caratlytics Score

How it works →

Excellent

Excellent quality and great value

Unlock full score analysis

See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1

Current: $4,170 USD|Low: $501 USD|High: $4,170 USD|Avg: $1,814 USD

Rare Carat

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

Retailer 13

Retailer 14

Retailer 15

Retailer 16

November 2, 2026

Retailer 3$501 USD

Retailer 2$648 USD

Retailer 4$737 USD

Retailer 12$745 USD

Retailer 9$1,020 USD

Retailer 14$1,361 USD

Retailer 13$1,408 USD

Retailer 15$1,480 USD

Retailer 7$1,570 USD

Retailer 5$2,079 USD

Retailer 8$2,115 USD

Retailer 6$2,146 USD

Retailer 10$2,560 USD

Retailer 11$3,132 USD

Retailer 16$3,980 USD

Rare Carat$4,170 USD

13 data points across 16 retailers

16 retailers$501 USD to $3,980 USD

Cheapest Retailer

$501 USD

Final sale: no returns

Retailer 2

$648 USD

£511 GBP

View

B+

Retailer 3

$737 USD

View

Retailer 4

$745 USD

View

Retailer 5

$1,020 USD

£803 GBP

View

Retailer 6

$1,361 USD

A$2,094 AUD

View

Retailer 7

$1,408 USD

View

Retailer 8

$1,480 USD

ZAR 23,904 ZAR

View

Retailer 9

$1,570 USD

View

Retailer 10

$2,079 USD

View

Retailer 11

$2,115 USD

View

Retailer 12

$2,146 USD

SGD 2,900 SGD

View

B+

Retailer 13

$2,560 USD

£2,016 GBP

View

B+

Retailer 14

$3,132 USD

A$4,818 AUD

View

Retailer 15

$3,980 USD

View

Most Expensive

Rare Carat

LA2653 · Oct 21

$4,170 USD

View

Price last confirmed 12 days ago

15 more retailers have this diamond

Prices start from $501 USDSave up to $3,479 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

Similar diamonds

2.57ct Radiant

$501 USD