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Round|Lab Grown|IGI

1.20ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG760544137

Shape and cutting style on the report: Round brilliant

Certificate IGI LG760544137

Diamond specifications and retailer prices

From £124 GBP
$165 USD
As of October 29, 2026
Save £597 GBP (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £721 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG760544137 or 760544137. Listed at 16 retailers as of October 29, 2026, with prices from £124 to £721, a £597 spread on the same certified stone. MOH London lists it at £721. 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

1.20
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG760544137
Dimensions6.72 × 6.67 × 4.21 mm
L/W Ratio1.01
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
6.72 mm6.67 mm1.20 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG760544137
Side View
Table 60.0%Crown 36.3°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: £721 GBP|Low: £118 GBP|High: £738 GBP|Avg: £293 GBP|-2.3%
MOH London
Retailer 2
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 16
October 30, 2026
Retailer 13£124 GBP
Retailer 14£139 GBP
Retailer 4£143 GBP
Retailer 7£153 GBP
Retailer 15£153 GBP
Retailer 10£265 GBP
Retailer 2£271 GBP
Retailer 5£276 GBP
Retailer 6£279 GBP
Retailer 9£305 GBP
Retailer 16£341 GBP
Retailer 11£353 GBP
Retailer 12£393 GBP
Retailer 8£428 GBP
Retailer 3£493 GBP
MOH London£721 GBP

34 data points across 16 retailers

16 retailers£124 GBP to £721 GBP

A
Cheapest Retailer
-
£124 GBP
$165 USD
A
Retailer 2
-
£139 GBP
$185 USD
View
Final sale: no returns
A
Retailer 3
-
£143 GBP
$191 USD
View
A
Retailer 4
-
£153 GBP
$204 USD
View
A
Retailer 5
-
£153 GBP
$204 USD
View
A
Retailer 6
-
£265 GBP
€336 EUR
View
A
Retailer 7
-
£271 GBP
View
A
Retailer 8
-
£276 GBP
$368 USD
View
A
Retailer 9
-
£279 GBP
$371 USD
View
B+
Retailer 10
-
£305 GBP
View
B+
Retailer 11
-
£341 GBP
$454 USD
View
Retailer 12
-
£353 GBP
$470 USD
View
Price last confirmed 8 days ago
B
Retailer 13
-
£393 GBP
$524 USD
View
B+
Retailer 14
-
£428 GBP
$570 USD
View
B
Retailer 15
-
£493 GBP
$657 USD
View
Most Expensive
B
MOH London
LG760544137 · Oct 29
£721 GBP
View
15 more retailers have this diamond
Prices start from £124 GBPSave up to £597 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
1.20ct Round
£124 GBP