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Round|Lab Grown|IGI

1.60ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG557240794

Shape and cutting style on the report: Round brilliant

Certificate IGI LG557240794

Diamond specifications and retailer prices

From £141 GBP
$189 USD
As of November 1, 2026
Save £679 GBP (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £820 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1.6ct lab-grown round diamond

This 1.6ct 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 LG557240794 or 557240794. Listed at 13 retailers as of October 26, 2026, with prices from £141 to £820, a £679 spread on the same certified stone. MOH London lists it at £820. 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

1.60
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG557240794
Dimensions7.45 × 7.48 × 4.57 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.45 mm7.48 mm1.60 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG557240794
Side View
Table 59.0%Crown 35.6°Girdle: Med.Pavilion 40.5°Culet: NoneDepth 61.3%

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: Nov 1
Current: £820 GBP|Low: £141 GBP|High: £840 GBP|Avg: £384 GBP|-2.3%
MOH London
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 1, 2026
Retailer 13£141 GBP
Retailer 9£164 GBP
Retailer 5£175 GBP
Retailer 8£175 GBP
Retailer 11£307 GBP
Retailer 2£312 GBP
Retailer 6£318 GBP
Retailer 3£371 GBP
Retailer 10£426 GBP
Retailer 7£556 GBP
Retailer 4£563 GBP
Retailer 12£565 GBP
MOH London£820 GBP

45 data points across 13 retailers

13 retailers£141 GBP to £820 GBP

A
Cheapest Retailer
-
£141 GBP
$189 USD
A
Retailer 2
-
£164 GBP
$220 USD
View
Retailer 3
-
£175 GBP
$235 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
£175 GBP
$235 USD
View
B+
Retailer 5
-
£307 GBP
$411 USD
View
A
Retailer 6
-
£312 GBP
View
A
Retailer 7
-
£318 GBP
View
B+
Retailer 8
-
£371 GBP
$497 USD
View
B+
Retailer 9
-
£426 GBP
$571 USD
View
B+
Retailer 10
-
£556 GBP
$745 USD
View
B
Retailer 11
-
£563 GBP
$755 USD
View
B
Retailer 12
-
£565 GBP
$757 USD
View
Most Expensive
B
MOH London
LG557240794 · Oct 26
£820 GBP
View
12 more retailers have this diamond
Prices start from £141 GBPSave up to £679 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
1.60ct Round
£141 GBP