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Round|Lab Grown|IGI

0.51ct D SI2 Round Lab Grown Diamond

ID • D/SI2 • IGI LG677571662

Shape and cutting style on the report: Round brilliant

Certificate IGI LG677571662

Diamond specifications and retailer prices

From £92 GBP
As of November 3, 2026
Save £858 GBP (90%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £950 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 0.51ct lab-grown round diamond

This 0.51ct lab-grown round sits in the half to three-quarter carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG677571662 or 677571662. Listed at 13 retailers as of November 2, 2026, with prices from £92 to £950, a £858 spread on the same certified stone. MOH London lists it at £950. 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

0.51
Carat
D
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG677571662
Dimensions5.10 × 5.15 × 3.16 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
5.10 mm5.15 mm0.51 ctD / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG677571662
Side View
Table 59.0%Crown 35.4°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 3
Current: £950 GBP|Low: £91 GBP|High: £955 GBP|Avg: £251 GBP|+0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 4, 2026
Retailer 3£92 GBP
Retailer 9£102 GBP
Retailer 11£106 GBP
Retailer 10£121 GBP
Retailer 14£121 GBP
Retailer 2£130 GBP
Retailer 5£186 GBP
Retailer 8£210 GBP
Retailer 13£219 GBP
Retailer 7£227 GBP
Retailer 6£241 GBP
Retailer 12£283 GBP
Retailer 4£366 GBP
Retailer 15£408 GBP
MOH London£950 GBP

24 data points across 15 retailers

13 retailers£92 GBP to £950 GBP

A
Cheapest Retailer
-
£92 GBP
A
Retailer 2
-
£102 GBP
View
Final sale: no returns
A
Retailer 3
-
£106 GBP
View
A
Retailer 4
-
£121 GBP
View
Retailer 5
-
£121 GBP
View
Price last confirmed 12 days ago
A
Retailer 6
-
£130 GBP
View
B+
Retailer 7
-
£186 GBP
View
B+
Retailer 8
-
£210 GBP
View
B+
Retailer 9
-
£219 GBP
View
B+
Retailer 10
-
£283 GBP
View
Retailer 11
-
£366 GBP
View
Price last confirmed 13 days ago
B
Retailer 12
-
£408 GBP
View
Most Expensive
B
MOH London
LG677571662 · Nov 2
£950 GBP
View
12 more retailers have this diamond
Prices start from £92 GBPSave up to £858 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
0.51ct Round
£92 GBP