CaratHunter
Plans
Radiant|Lab Grown|IGI

0.51ct D SI1 Radiant Lab Grown Diamond

EX • D/SI1 • IGI LG843636772

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG843636772

Diamond specifications and retailer prices

From £67 GBP
$90 USD
As of October 30, 2026
Save £551 GBP (89%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £618 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 0.51ct lab-grown radiant diamond

This 0.51ct lab-grown radiant 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 LG843636772 or 843636772. Listed at 13 retailers as of October 29, 2026, with prices from £67 to £618, a £551 spread on the same certified stone. MOH London lists it at £618. 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 angle34.7°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843636772
Dimensions5.60 × 3.98 × 2.70 mm
L/W Ratio1.41
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.60 mm3.98 mm0.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843636772
Side View
Table 64.0%Crown 34.7°Girdle: Slightly ThickPavilion 39.9°Culet: NoneDepth 67.8%

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 30
Current: £618 GBP|Low: £67 GBP|High: £631 GBP|Avg: £220 GBP|-2.1%
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
October 31, 2026
Retailer 10£67 GBP
Retailer 11£75 GBP
Retailer 6£78 GBP
Retailer 3£89 GBP
Retailer 12£113 GBP
Retailer 7£152 GBP
Retailer 2£157 GBP
Retailer 13£202 GBP
Retailer 4£239 GBP
Retailer 5£269 GBP
Retailer 8£297 GBP
Retailer 9£313 GBP
MOH London£618 GBP

7 data points across 13 retailers

13 retailers£67 GBP to £618 GBP

A
Cheapest Retailer
-
£67 GBP
$90 USD
A
Retailer 2
-
£75 GBP
$101 USD
View
Final sale: no returns
A
Retailer 3
-
£78 GBP
$104 USD
View
A
Retailer 4
-
£89 GBP
$119 USD
View
B+
Retailer 5
-
£113 GBP
$152 USD
View
A
Retailer 6
-
£152 GBP
View
A
Retailer 7
-
£157 GBP
€200 EUR
View
A
Retailer 8
-
£202 GBP
View
B+
Retailer 9
-
£239 GBP
SGD 432 SGD
View
B+
Retailer 10
-
£269 GBP
$360 USD
View
B+
Retailer 11
-
£297 GBP
$398 USD
View
B+
Retailer 12
-
£313 GBP
$419 USD
View
Most Expensive
B
MOH London
LG843636772 · Oct 29
£618 GBP
View
12 more retailers have this diamond
Prices start from £67 GBPSave up to £551 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 Radiant
£67 GBP