CaratHunter
Plans
Oval|Lab Grown|IGI

0.51ct D SI1 Oval Lab Grown Diamond

EX • D/SI1 • IGI LG764605608

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG764605608

Diamond specifications and retailer prices

From £64 GBP
As of November 1, 2026
Save £246 GBP (79%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £590 GBP at MOH London · As of October 29, 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 LG764605608 or 764605608. Listed at 15 retailers as of November 1, 2026, with a 383% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle32.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG764605608
Dimensions6.19 × 4.56 × 2.85 mm
L/W Ratio1.36
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
6.19 mm4.56 mm0.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG764605608
Side View
Table 58.0%Crown 32.5°Girdle: STK-THKPavilion 40.8°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £590 GBP|Low: £62 GBP|High: £594 GBP|Avg: £187 GBP|-0.6%
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
November 2, 2026
Retailer 9£64 GBP
Retailer 13£72 GBP
Retailer 5£85 GBP
Retailer 12£85 GBP
Retailer 7£127 GBP
Retailer 6£144 GBP
Retailer 10£153 GBP
Retailer 3£170 GBP
Retailer 2£171 GBP
Retailer 8£193 GBP
Retailer 11£209 GBP
Retailer 4£310 GBP
MOH London£590 GBP

41 data points across 13 retailers

15 retailers£64 GBP to £310 GBP

A
Cheapest Retailer
-
£64 GBP
A
Retailer 2
-
£75 GBP
View
A
Retailer 3
-
£85 GBP
View
Retailer 4
-
£85 GBP
View
Price last confirmed 12 days ago
A
Retailer 5
-
£127 GBP
View
A
Retailer 6
-
£144 GBP
View
A
Retailer 7
-
£153 GBP
View
A
Retailer 8
-
£170 GBP
View
B+
Retailer 9
-
£171 GBP
View
A
Retailer 10
-
£193 GBP
View
B+
Retailer 11
-
£209 GBP
View
B+
Retailer 12
-
£257 GBP
View
B
Retailer 13
-
£301 GBP
View
B
Retailer 14
-
£310 GBP
View
Most Expensive
MOH London
LG764605608 · Oct 29
£590 GBP
View
Price last confirmed 8 days ago
14 more retailers have this diamond
Prices start from £64 GBPSave up to £246 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
£64 GBP