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Round|Lab Grown|IGI

0.51ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG502108737

Shape and cutting style on the report: Round brilliant

Certificate IGI LG502108737

Diamond specifications and retailer prices

From £204 GBP
$274 USD
As of October 29, 2026
Save £819 GBP (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,024 GBP at MOH London · As of October 29, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG502108737 or 502108737. Listed at 11 retailers as of October 29, 2026, with prices from £204 to £1,024, a £819 spread on the same certified stone. MOH London lists it at £1,024. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.9°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG502108737
Dimensions5.19 × 5.17 × 3.14 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
5.19 mm5.17 mm0.51 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG502108737
Side View
Table 55.5%Crown 31.9°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.5%

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: Oct 29
Current: £1,024 GBP|Low: £164 GBP|High: £1,030 GBP|Avg: £415 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
Retailer 14
October 31, 2026
Retailer 8£204 GBP
Retailer 6£214 GBP
Retailer 13£229 GBP
Retailer 3£237 GBP
Retailer 9£239 GBP
Retailer 10£254 GBP
Retailer 12£254 GBP
Retailer 4£373 GBP
Retailer 11£421 GBP
Retailer 2£474 GBP
Retailer 5£517 GBP
Retailer 7£780 GBP
Retailer 14£816 GBP
MOH London£1,024 GBP

20 data points across 14 retailers

11 retailers£204 GBP to £1,024 GBP

A
Cheapest Retailer
-
£204 GBP
$274 USD
A
Retailer 2
-
£229 GBP
$307 USD
View
Final sale: no returns
A
Retailer 3
-
£237 GBP
$318 USD
View
A
Retailer 4
-
£239 GBP
$320 USD
View
A
Retailer 5
-
£254 GBP
$340 USD
View
A
Retailer 6
-
£254 GBP
$340 USD
View
B+
Retailer 7
-
£421 GBP
$564 USD
View
B+
Retailer 8
-
£474 GBP
€605 EUR
View
B
Retailer 9
-
£780 GBP
$1,045 USD
View
B
Retailer 10
-
£816 GBP
$1,094 USD
View
Most Expensive
B
MOH London
LG502108737 · Oct 29
£1,024 GBP
View
10 more retailers have this diamond
Prices start from £204 GBPSave up to £819 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
£204 GBP