CaratHunter
Plans
Cushion|Lab Grown|IGI

0.51ct E SI1 Cushion Lab Grown Diamond

VG • E/SI1 • IGI LG752510530

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG752510530

Diamond specifications and retailer prices

From £207 GBP
As of October 30, 2026
Save £817 GBP (80%) vs most expensive(unlock to see where)
5 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 cushion diamond

This 0.51ct lab-grown cushion sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG752510530 or 752510530. Listed at 5 retailers as of October 29, 2026, with prices from £207 to £1,024, a £817 spread on the same certified stone. MOH London lists it at £1,024. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG752510530
Dimensions4.63 × 4.44 × 3.10 mm
L/W Ratio1.04
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
4.63 mm4.44 mm0.51 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG752510530
Side View
Table 62.0%Crown 39°Girdle: STK-THKPavilion 39.5°Culet: NoneDepth 69.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £1,024 GBP|Low: £200 GBP|High: £1,024 GBP|Avg: £358 GBP|+56.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 30, 2026
Retailer 2£207 GBP
Retailer 3£222 GBP
Retailer 4£231 GBP
Retailer 5£304 GBP
MOH London£1,024 GBP

43 data points across 5 retailers

5 retailers£207 GBP to £1,024 GBP

B+
Cheapest Retailer
-
£207 GBP
B+
Retailer 2
-
£222 GBP
€281 EUR
View
B+
Retailer 3
-
£231 GBP
$308 USD
View
Retailer 4
-
£304 GBP
View
Price last confirmed 16 days ago
Most Expensive
C
MOH London
LG752510530 · Oct 29
£1,024 GBP
View
4 more retailers have this diamond
Prices start from £207 GBPSave up to £817 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.

B+
0.51ct Cushion
£207 GBP