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Round|Lab Grown|IGI

1.51ct H SI1 Round Lab Grown Diamond

EX • H/SI1 • IGI LG770653207

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770653207

Diamond specifications and retailer prices

From £147 GBP
$197 USD
As of November 1, 2026
Save £704 GBP (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £851 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG770653207 or 770653207. Listed at 14 retailers as of November 1, 2026, with prices from £147 to £851, a £704 spread on the same certified stone. MOH London lists it at £851. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770653207
Dimensions7.48 × 7.47 × 4.38 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.48 mm7.47 mm1.51 ctH / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770653207
Side View
Table 63.0%Crown 32.9°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 58.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £851 GBP|Low: £141 GBP|High: £862 GBP|Avg: £433 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
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Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
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Retailer 16
November 1, 2026
Retailer 10£147 GBP
Retailer 3£164 GBP
Retailer 15£170 GBP
Retailer 4£182 GBP
Retailer 12£182 GBP
Retailer 13£316 GBP
Retailer 2£335 GBP
Retailer 5£428 GBP
Retailer 14£430 GBP
Retailer 11£582 GBP
Retailer 16£585 GBP
Retailer 9£587 GBP
Retailer 6£594 GBP
Retailer 8£666 GBP
Retailer 7£782 GBP
MOH London£851 GBP

19 data points across 16 retailers

14 retailers£147 GBP to £851 GBP

A
Cheapest Retailer
-
£147 GBP
$197 USD
A
Retailer 2
-
£164 GBP
$220 USD
View
Final sale: no returns
A
Retailer 3
-
£170 GBP
$228 USD
View
Retailer 4
-
£182 GBP
$244 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
£182 GBP
$244 USD
View
B+
Retailer 6
-
£316 GBP
$424 USD
View
A
Retailer 7
-
£335 GBP
€427 EUR
View
A
Retailer 8
-
£428 GBP
$573 USD
View
A
Retailer 9
-
£430 GBP
$576 USD
View
A
Retailer 10
-
£582 GBP
$780 USD
View
A
Retailer 11
-
£585 GBP
$784 USD
View
A
Retailer 12
-
£587 GBP
$787 USD
View
A
Retailer 13
-
£594 GBP
SGD 1,076 SGD
View
Most Expensive
A
MOH London
LG770653207 · Nov 1
£851 GBP
View
13 more retailers have this diamond
Prices start from £147 GBPSave up to £704 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
£147 GBP