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Round|Lab Grown|IGI

2.57ct J VS1 Round Lab Grown Diamond

ID • J/VS1 • IGI LG517284792

Shape and cutting style on the report: Round brilliant

Certificate IGI LG517284792

Diamond specifications and retailer prices

From £445 GBP
$592 USD
As of October 29, 2026
Save £1,951 GBP (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,066 GBP at Rare Carat · As of July 12, 2026
View at Rare Carat

About this 2.57ct lab-grown round diamond

This 2.57ct lab-grown round sits in the two to three carat band, graded J colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG517284792 or 517284792. Listed at 15 retailers as of October 26, 2026, with a 439% 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
J
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG517284792
Dimensions8.79 × 8.75 × 5.45 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.79 mm8.75 mm2.57 ctJ / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG517284792
Side View
Table 56.5%Crown 34.4°Girdle: MediumPavilion 41°Culet: NoneDepth 62.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £4,066 GBP|Low: £354 GBP|High: £4,066 GBP|Avg: £1,348 GBP
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
October 29, 2026
Retailer 9£445 GBP
Retailer 13£497 GBP
Retailer 10£551 GBP
Retailer 6£650 GBP
Retailer 12£741 GBP
Retailer 11£846 GBP
Retailer 3£900 GBP
Retailer 5£1,154 GBP
Retailer 2£1,330 GBP
Retailer 8£1,367 GBP
Retailer 4£1,783 GBP
Retailer 7£2,396 GBP
Rare Carat£4,066 GBP

25 data points across 13 retailers

15 retailers£445 GBP to £2,396 GBP

A
Cheapest Retailer
-
£445 GBP
$592 USD
A
Retailer 2
-
£497 GBP
$662 USD
View
Final sale: no returns
A
Retailer 3
-
£498 GBP
$663 USD
View
Retailer 4
-
£551 GBP
$734 USD
View
Price last confirmed 13 days ago
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Retailer 5
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£551 GBP
$734 USD
View
A
Retailer 6
-
£650 GBP
$865 USD
View
A
Retailer 7
-
£741 GBP
$987 USD
View
A
Retailer 8
-
£846 GBP
$1,126 USD
View
A
Retailer 9
-
£900 GBP
$1,198 USD
View
A
Retailer 10
-
£1,330 GBP
ZAR 28,606 ZAR
View
A
Retailer 11
-
£1,367 GBP
$1,821 USD
View
A
Retailer 12
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£1,449 GBP
$1,930 USD
View
A
Retailer 13
-
£1,783 GBP
$2,374 USD
View
A
Retailer 14
-
£2,396 GBP
View
Most Expensive
Rare Carat
919459 · Jul 12
£4,066 GBP
$5,414 USD
View
Price last confirmed 109 days ago
14 more retailers have this diamond
Prices start from £445 GBPSave up to £1,951 GBP

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.

A
2.57ct Round
£445 GBP