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Round|Lab Grown|IGI

1.57ct K SI2 Round Lab Grown Diamond

EX • K/SI2 • IGI LG440012874

Shape and cutting style on the report: Round brilliant

Certificate IGI LG440012874

Diamond specifications and retailer prices

From £1,395 GBP
As of November 5, 2026
Save £1,637 GBP (54%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £4,607 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.57ct lab-grown round diamond

This 1.57ct lab-grown round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG440012874 or 440012874. Listed at 8 retailers as of November 5, 2026, with a 117% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.57
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG440012874
Dimensions7.43 × 7.44 × 4.55 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.43 mm7.44 mm1.57 ctK / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG440012874
Side View
Table 60.0%Crown 34.9°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £4,607 GBP|Low: £1,339 GBP|High: £4,681 GBP|Avg: £2,568 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 3£1,395 GBP
Retailer 6£1,517 GBP
Retailer 4£1,617 GBP
Retailer 8£2,073 GBP
Retailer 5£2,534 GBP
Retailer 2£2,655 GBP
Retailer 7£3,031 GBP
Retailer 9£3,619 GBP
MOH London£4,607 GBP

15 data points across 9 retailers

8 retailers£1,395 GBP to £3,031 GBP

B+
Cheapest Retailer
-
£1,395 GBP
B
Retailer 2
-
£1,517 GBP
View
B
Retailer 3
-
£1,617 GBP
View
Retailer 4
-
£1,617 GBP
View
Price last confirmed 26 days ago
B
Retailer 5
-
£2,534 GBP
View
B
Retailer 6
-
£2,655 GBP
View
C
Retailer 7
-
£3,031 GBP
View
Most Expensive
MOH London
LG440012874 · Nov 5
£4,607 GBP
View
Price under review
7 more retailers have this diamond
Prices start from £1,395 GBPSave up to £1,637 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.

B+
1.57ct Round
£1,395 GBP