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Round|Lab Grown|IGI

1.51ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG794610644

Shape and cutting style on the report: Round brilliant

Certificate IGI LG794610644

Diamond specifications and retailer prices

From £146 GBP
$196 USD
As of October 29, 2026
Save £710 GBP (83%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £856 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.51ct lab-grown round diamond

This 1.51ct 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 LG794610644 or 794610644. Listed at 19 retailers as of October 29, 2026, with prices from £146 to £856, a £710 spread on the same certified stone. MOH London lists it at £856. 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

1.51
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG794610644
Dimensions7.44 × 7.38 × 4.47 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
7.44 mm7.38 mm1.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG794610644
Side View
Table 57.0%Crown 34°Girdle: MediumPavilion 40.2°Culet: NoneDepth 60.4%

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: Oct 29
Current: £856 GBP|Low: £143 GBP|High: £871 GBP|Avg: £419 GBP|-0.7%
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
Retailer 14
Retailer 15
Retailer 16
October 31, 2026
Retailer 4£146 GBP
Retailer 13£163 GBP
Retailer 12£169 GBP
Retailer 2£181 GBP
Retailer 6£182 GBP
Retailer 14£315 GBP
Retailer 16£330 GBP
Retailer 7£339 GBP
Retailer 11£429 GBP
Retailer 10£469 GBP
Retailer 5£534 GBP
Retailer 9£582 GBP
Retailer 15£590 GBP
Retailer 3£622 GBP
Retailer 8£642 GBP
MOH London£856 GBP

35 data points across 16 retailers

19 retailers£146 GBP to £856 GBP

Retailer 1
-
£146 GBP
$196 USD
Price last confirmed 43 days ago
A
Retailer 2
-
£146 GBP
$196 USD
View
A
Retailer 3
-
£163 GBP
$218 USD
View
Final sale: no returns
A
Retailer 4
-
£169 GBP
$227 USD
View
Retailer 5
-
£178 GBP
$238 USD
View
Price last confirmed 42 days ago
A
Retailer 6
-
£181 GBP
$243 USD
View
A
Retailer 7
-
£182 GBP
$244 USD
View
B+
Retailer 8
-
£315 GBP
$422 USD
View
A
Retailer 9
-
£330 GBP
View
A
Retailer 10
-
£339 GBP
$454 USD
View
B+
Retailer 11
-
£429 GBP
$575 USD
View
B+
Retailer 12
-
£469 GBP
$628 USD
View
B+
Retailer 13
-
£534 GBP
$715 USD
View
Retailer 14
-
£578 GBP
$775 USD
View
Price last confirmed 40 days ago
B+
Retailer 15
-
£582 GBP
$780 USD
View
B+
Retailer 16
-
£590 GBP
SGD 1,068 SGD
View
B+
Retailer 17
-
£622 GBP
$833 USD
View
B
Retailer 18
-
£642 GBP
$860 USD
View
Most Expensive
B
MOH London
LG794610644 · Oct 29
£856 GBP
View
18 more retailers have this diamond
Prices start from £146 GBPSave up to £710 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
1.51ct Round
£146 GBP