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Round|Lab Grown|IGI

1.51ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG844682459

Shape and cutting style on the report: Round brilliant

Certificate IGI LG844682459

Diamond specifications and retailer prices

From £193 GBP
$258 USD
As of October 27, 2026
Save £584 GBP (75%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £776 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 LG844682459 or 844682459. Listed at 9 retailers as of October 27, 2026, with prices from £193 to £776, a £584 spread on the same certified stone. MOH London lists it at £776. 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 angle35.7°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG844682459
Dimensions7.30 × 7.27 × 4.52 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.30 mm7.27 mm1.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG844682459
Side View
Table 57.0%Crown 35.7°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 61.9%

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 27
Current: £776 GBP|Low: £193 GBP|High: £776 GBP|Avg: £414 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 29, 2026
Retailer 5£193 GBP
Retailer 8£248 GBP
Retailer 6£343 GBP
Retailer 3£345 GBP
Retailer 2£353 GBP
Retailer 4£621 GBP
Retailer 7£625 GBP
MOH London£776 GBP

7 data points across 8 retailers

9 retailers£193 GBP to £776 GBP

A
Cheapest Retailer
-
£193 GBP
$258 USD
Retailer 2
-
£193 GBP
$258 USD
View
Price last confirmed 7 days ago
B+
Retailer 3
-
£248 GBP
$332 USD
View
A
Retailer 4
-
£343 GBP
$459 USD
View
A
Retailer 5
-
£345 GBP
View
A
Retailer 6
-
£353 GBP
View
B
Retailer 7
-
£621 GBP
$832 USD
View
B
Retailer 8
-
£625 GBP
SGD 1,131 SGD
View
Most Expensive
B
MOH London
LG844682459 · Oct 29
£776 GBP
View
8 more retailers have this diamond
Prices start from £193 GBPSave up to £584 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
£193 GBP