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Cushion|Lab Grown|IGI

0.51ct D SI1 Cushion Lab Grown Diamond

VG • D/SI1 • IGI LG752551082

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG752551082

Diamond specifications and retailer prices

From £206 GBP
As of October 30, 2026
Save £812 GBP (80%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,018 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 D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG752551082 or 752551082. Listed at 5 retailers as of October 29, 2026, with prices from £206 to £1,018, a £812 spread on the same certified stone. MOH London lists it at £1,018. 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
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG752551082
Dimensions4.62 × 4.58 × 3.19 mm
L/W Ratio1.01
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
4.62 mm4.58 mm0.51 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG752551082
Side View
Table 62.0%Crown 35.3°Girdle: MED-THKPavilion 41.4°Culet: NoneDepth 69.7%

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: £1,018 GBP|Low: £199 GBP|High: £1,018 GBP|Avg: £361 GBP|+56.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 31, 2026
Retailer 3£206 GBP
Retailer 2£219 GBP
Retailer 5£230 GBP
Retailer 4£293 GBP
MOH London£1,018 GBP

41 data points across 5 retailers

5 retailers£206 GBP to £1,018 GBP

B+
Cheapest Retailer
-
£206 GBP
B+
Retailer 2
-
£219 GBP
€280 EUR
View
B+
Retailer 3
-
£230 GBP
$308 USD
View
B+
Retailer 4
-
£293 GBP
View
Most Expensive
C
MOH London
LG752551082 · Oct 29
£1,018 GBP
View
4 more retailers have this diamond
Prices start from £206 GBPSave up to £812 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
£206 GBP