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Round|Lab Grown|IGI

1.57ct H SI1 Round Lab Grown Diamond

EX • H/SI1 • IGI LG407939119

Shape and cutting style on the report: Round brilliant

Certificate IGI LG407939119

Diamond specifications and retailer prices

From £1,015 GBP
$1,360 USD
As of October 29, 2026
Save £3,118 GBP (75%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £4,133 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG407939119 or 407939119. Listed at 12 retailers as of October 29, 2026, with prices from £1,015 to £4,133, a £3,118 spread on the same certified stone. MOH London lists it at £4,133. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG407939119
Dimensions7.42 × 7.38 × 4.64 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
7.42 mm7.38 mm1.57 ctH / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG407939119
Side View
Table 54.5%Crown 36.3°Girdle: MediumPavilion 40.6°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £4,133 GBP|Low: £1,015 GBP|High: £4,166 GBP|Avg: £2,320 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 6£1,015 GBP
Retailer 5£1,241 GBP
Retailer 9£1,390 GBP
Retailer 7£1,440 GBP
Retailer 4£1,505 GBP
Retailer 10£1,567 GBP
Retailer 12£1,926 GBP
Retailer 8£2,262 GBP
Retailer 2£2,482 GBP
Retailer 11£3,957 GBP
Retailer 3£4,120 GBP
MOH London£4,133 GBP

16 data points across 12 retailers

12 retailers£1,015 GBP to £4,133 GBP

A
Cheapest Retailer
-
£1,015 GBP
$1,360 USD
B+
Retailer 2
-
£1,241 GBP
$1,663 USD
View
B+
Retailer 3
-
£1,350 GBP
$1,809 USD
View
B+
Retailer 4
-
£1,390 GBP
$1,862 USD
View
Final sale: no returns
B
Retailer 5
-
£1,440 GBP
$1,929 USD
View
Retailer 6
-
£1,440 GBP
$1,929 USD
View
Price last confirmed 18 days ago
B+
Retailer 7
-
£1,567 GBP
$2,100 USD
View
B
Retailer 8
-
£2,262 GBP
$3,031 USD
View
B
Retailer 9
-
£2,482 GBP
$3,325 USD
View
B
Retailer 10
-
£2,698 GBP
$3,615 USD
View
B
Retailer 11
-
£3,957 GBP
$5,302 USD
View
Most Expensive
B
MOH London
LG407939119 · Oct 29
£4,133 GBP
View
11 more retailers have this diamond
Prices start from £1,015 GBPSave up to £3,118 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
£1,015 GBP