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Round|Lab Grown|IGI

1.51ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG770669393

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770669393

Diamond specifications and retailer prices

From £166 GBP
As of November 5, 2026
Save £741 GBP (82%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £906 GBP at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG770669393 or 770669393. Listed at 15 retailers as of November 5, 2026, with prices from £166 to £906, a £741 spread on the same certified stone. Brilliant Earth lists it at £906. 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
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770669393
Dimensions7.35 × 7.30 × 4.56 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
7.35 mm7.30 mm1.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770669393
Side View
Table 60.0%Crown 34.8°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £906 GBP|Low: £159 GBP|High: £906 GBP|Avg: £460 GBP|+0.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 9£166 GBP
Retailer 10£205 GBP
Retailer 8£275 GBP
Retailer 3£317 GBP
Retailer 2£344 GBP
Retailer 4£377 GBP
Retailer 5£561 GBP
Retailer 6£568 GBP
Retailer 7£822 GBP
Brilliant Earth£906 GBP

43 data points across 10 retailers

15 retailers£166 GBP to £906 GBP

A
Cheapest Retailer
-
£166 GBP
A
Retailer 2
-
£192 GBP
View
Retailer 3
-
£205 GBP
View
Price last confirmed 12 days ago
A
Retailer 4
-
£205 GBP
View
B+
Retailer 5
-
£275 GBP
View
A
Retailer 6
-
£317 GBP
View
A
Retailer 7
-
£332 GBP
View
A
Retailer 8
-
£344 GBP
View
A
Retailer 9
-
£377 GBP
View
B+
Retailer 10
-
£449 GBP
View
B
Retailer 11
-
£561 GBP
View
B+
Retailer 12
-
£568 GBP
View
B
Retailer 13
-
£659 GBP
View
Retailer 14
-
£822 GBP
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
20482981A · Nov 5
£906 GBP
$1,220 USD
View
14 more retailers have this diamond
Prices start from £166 GBPSave up to £741 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
£166 GBP