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Oval|Lab Grown|IGI

0.51ct D SI1 Oval Lab Grown Diamond

EX • D/SI1 • IGI LG837660529

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG837660529

Diamond specifications and retailer prices

From £138 GBP
As of November 4, 2026
Save £708 GBP (84%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £846 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 0.51ct lab-grown oval diamond

This 0.51ct lab-grown oval sits in the half to three-quarter carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG837660529 or 837660529. Listed at 8 retailers as of November 4, 2026, with prices from £138 to £846, a £708 spread on the same certified stone. MOH London lists it at £846. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle38.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837660529
Dimensions6.26 × 4.48 × 2.79 mm
L/W Ratio1.40
Girdle conditionFaceted
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
6.26 mm4.48 mm0.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837660529
Side View
Table 62.0%Crown 35.8°Girdle: STK-THKPavilion 38.1°Culet: NoneDepth 62.3%

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 4
Current: £846 GBP|Low: £134 GBP|High: £884 GBP|Avg: £304 GBP|-4.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8£134 GBP
Retailer 7£138 GBP
Retailer 3£182 GBP
Retailer 2£201 GBP
Retailer 5£245 GBP
Retailer 4£269 GBP
Retailer 6£370 GBP
MOH London£846 GBP

20 data points across 8 retailers

8 retailers£138 GBP to £846 GBP

Retailer 1
-
£134 GBP
Price last confirmed 9 days ago
A
Retailer 2
-
£138 GBP
View
A
Retailer 3
-
£182 GBP
View
A
Retailer 4
-
£201 GBP
View
Retailer 5
-
£245 GBP
View
Price last confirmed 9 days ago
B+
Retailer 6
-
£269 GBP
View
B
Retailer 7
-
£370 GBP
View
Most Expensive
B
MOH London
LG837660529 · Nov 5
£846 GBP
View
7 more retailers have this diamond
Prices start from £138 GBPSave up to £708 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 Oval
£138 GBP