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Round|Lab Grown|IGI

1.51ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG818686567

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686567

Diamond specifications and retailer prices

From £150 GBP
$201 USD
As of November 1, 2026
Save £721 GBP (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £871 GBP at MOH London · As of November 1, 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 LG818686567 or 818686567. Listed at 15 retailers as of November 1, 2026, with prices from £150 to £871, a £721 spread on the same certified stone. MOH London lists it at £871. 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 angle34.2°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686567
Dimensions7.36 × 7.33 × 4.53 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.36 mm7.33 mm1.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686567
Side View
Table 57.0%Crown 34.2°Girdle: MediumPavilion 40.8°Culet: NoneDepth 61.7%

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: £871 GBP|Low: £150 GBP|High: £881 GBP|Avg: £448 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 9£150 GBP
Retailer 11£187 GBP
Retailer 6£310 GBP
Retailer 12£323 GBP
Retailer 2£332 GBP
Retailer 5£338 GBP
Retailer 4£340 GBP
Retailer 7£481 GBP
Retailer 8£534 GBP
Retailer 3£639 GBP
Retailer 10£642 GBP
MOH London£871 GBP

44 data points across 12 retailers

15 retailers£150 GBP to £871 GBP

A
Cheapest Retailer
-
£150 GBP
$201 USD
A
Retailer 2
-
£174 GBP
$233 USD
View
Retailer 3
-
£187 GBP
$250 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
£187 GBP
$250 USD
View
A
Retailer 5
-
£310 GBP
€396 EUR
View
B+
Retailer 6
-
£323 GBP
$433 USD
View
A
Retailer 7
-
£332 GBP
View
A
Retailer 8
-
£338 GBP
View
A
Retailer 9
-
£340 GBP
$456 USD
View
B+
Retailer 10
-
£481 GBP
$644 USD
View
B+
Retailer 11
-
£534 GBP
$715 USD
View
B+
Retailer 12
-
£599 GBP
$802 USD
View
B
Retailer 13
-
£639 GBP
$856 USD
View
B
Retailer 14
-
£642 GBP
$860 USD
View
Most Expensive
B
MOH London
LG818686567 · Nov 1
£871 GBP
View
14 more retailers have this diamond
Prices start from £150 GBPSave up to £721 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
£150 GBP