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Round|Lab Grown|IGI

1.57ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG784636784

Shape and cutting style on the report: Round brilliant

Certificate IGI LG784636784

Diamond specifications and retailer prices

From £278 GBP
$372 USD
As of November 1, 2026
Save £557 GBP (67%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £835 GBP at MOH London · As of November 1, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG784636784 or 784636784. Listed at 8 retailers as of November 1, 2026, with prices from £278 to £835, a £557 spread on the same certified stone. MOH London lists it at £835. 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784636784
Dimensions7.51 × 7.47 × 4.54 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.51 mm7.47 mm1.57 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784636784
Side View
Table 59.0%Crown 33°Girdle: MediumPavilion 41°Culet: NoneDepth 60.7%

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 1
Current: £835 GBP|Low: £272 GBP|High: £845 GBP|Avg: £526 GBP|+2.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 7£278 GBP
Retailer 3£342 GBP
Retailer 8£369 GBP
Retailer 2£388 GBP
Retailer 5£455 GBP
Retailer 4£549 GBP
Retailer 6£709 GBP
Retailer 9£821 GBP
MOH London£835 GBP

41 data points across 9 retailers

8 retailers£278 GBP to £835 GBP

B+
Cheapest Retailer
-
£278 GBP
$372 USD
A
Retailer 2
-
£342 GBP
€436 EUR
View
A
Retailer 3
-
£369 GBP
$494 USD
View
A
Retailer 4
-
£388 GBP
View
B+
Retailer 5
-
£455 GBP
$610 USD
View
Retailer 6
-
£549 GBP
$735 USD
View
Price last confirmed 14 days ago
B
Retailer 7
-
£709 GBP
$951 USD
View
Most Expensive
B
MOH London
LG784636784 · Nov 1
£835 GBP
View
7 more retailers have this diamond
Prices start from £278 GBPSave up to £557 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
£278 GBP