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1.57ct H SI2 Round Lab Grown Diamond

EX • H/SI2 • IGI LG476157423

Shape and cutting style on the report: Round brilliant

Certificate IGI LG476157423

Diamond specifications and retailer prices

From £664 GBP
$890 USD
As of October 30, 2026
Save £2,762 GBP (81%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,426 GBP at MOH London · As of October 29, 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG476157423 or 476157423. Listed at 10 retailers as of October 29, 2026, with prices from £664 to £3,426, a £2,762 spread on the same certified stone. MOH London lists it at £3,426. 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
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG476157423
Dimensions7.37 × 7.33 × 4.64 mm
L/W Ratio1.01
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
7.37 mm7.33 mm1.57 ctH / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG476157423
Side View
Table 56.5%Crown 35.9°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 63.1%

Caratlytics Score

How it works →
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 30
Current: £3,426 GBP|Low: £664 GBP|High: £3,454 GBP|Avg: £1,866 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 2£664 GBP
Retailer 4£1,152 GBP
Retailer 7£1,343 GBP
Retailer 6£1,634 GBP
Retailer 3£1,885 GBP
Retailer 5£2,166 GBP
Retailer 8£2,672 GBP
MOH London£3,426 GBP

14 data points across 8 retailers

10 retailers£664 GBP to £3,426 GBP

A
Cheapest Retailer
-
£664 GBP
$890 USD
B+
Retailer 2
-
£1,028 GBP
$1,378 USD
View
B+
Retailer 3
-
£1,119 GBP
$1,500 USD
View
B+
Retailer 4
-
£1,152 GBP
$1,543 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,193 GBP
$1,599 USD
View
Retailer 6
-
£1,193 GBP
$1,599 USD
View
Price last confirmed 17 days ago
B
Retailer 7
-
£1,885 GBP
$2,526 USD
View
B
Retailer 8
-
£2,166 GBP
$2,902 USD
View
B
Retailer 9
-
£2,237 GBP
$2,997 USD
View
Most Expensive
B
MOH London
LG476157423 · Oct 29
£3,426 GBP
View
9 more retailers have this diamond
Prices start from £664 GBPSave up to £2,762 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
1.57ct Round
£664 GBP