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Heart|Lab Grown|IGI

2.57ct D SI1 Heart Lab Grown Diamond

EX • D/SI1 • IGI LG668469150

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG668469150

Diamond specifications and retailer prices

From £281 GBP
As of November 4, 2026
Save £1,774 GBP (86%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,055 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 2.57ct lab-grown heart diamond

This 2.57ct lab-grown heart sits in the two to three carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG668469150 or 668469150. Listed at 14 retailers as of November 4, 2026, with prices from £281 to £2,055, a £1,774 spread on the same certified stone. Brilliant Earth lists it at £2,055. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

2.57
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle39°
OriginLab Grown
Grading LabIGI
CertificateIGI LG668469150
Dimensions8.32 × 9.59 × 5.59 mm
L/W Ratio1.15
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.32 mm9.59 mm2.57 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG668469150
Side View
Table 57.0%Crown 33.5°Girdle: MED-STKPavilion 39°Culet: NoneDepth 58.3%

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: Nov 4
Current: £2,055 GBP|Low: £281 GBP|High: £3,026 GBP|Avg: £888 GBP|-32.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 5, 2026
Retailer 7£281 GBP
Retailer 8£315 GBP
Retailer 11£348 GBP
Retailer 13£428 GBP
Retailer 10£459 GBP
Retailer 5£556 GBP
Retailer 3£619 GBP
Retailer 2£623 GBP
Retailer 4£750 GBP
Retailer 12£977 GBP
Retailer 9£1,120 GBP
Retailer 6£1,357 GBP
Brilliant Earth£2,055 GBP

34 data points across 13 retailers

14 retailers£281 GBP to £2,055 GBP

A
Cheapest Retailer
-
£281 GBP
Retailer 2
-
£303 GBP
View
Price last confirmed 40 days ago
A
Retailer 3
-
£315 GBP
View
Retailer 4
-
£348 GBP
View
Price last confirmed 25 days ago
Retailer 5
-
£348 GBP
View
Price last confirmed 12 days ago
A
Retailer 6
-
£459 GBP
View
B+
Retailer 7
-
£556 GBP
View
B+
Retailer 8
-
£619 GBP
View
B+
Retailer 9
-
£623 GBP
View
B+
Retailer 10
-
£750 GBP
View
B
Retailer 11
-
£977 GBP
View
B
Retailer 12
-
£1,120 GBP
View
B
Retailer 13
-
£1,357 GBP
View
Most Expensive
B
Brilliant Earth
12460210A · Nov 4
£2,055 GBP
$2,750 USD
View
13 more retailers have this diamond
Prices start from £281 GBPSave up to £1,774 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 Heart
£281 GBP