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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 $276 USD
£217 GBP
As of October 30, 2026
Save $1,088 USD (80%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,364 USD 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 $276 to $1,364, a $1,088 spread on the same certified stone. MOH London lists it at $1,364. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,364 USD|Low: $266 USD|High: $1,364 USD|Avg: $482 USD|+56.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 31, 2026
Retailer 3$276 USD
Retailer 2$294 USD
Retailer 5$308 USD
Retailer 4$392 USD
MOH London$1,364 USD

42 data points across 5 retailers

5 retailers$276 USD to $1,364 USD

B+
Cheapest Retailer
-
$276 USD
£217 GBP
B+
Retailer 2
-
$294 USD
€280 EUR
View
B+
Retailer 3
-
$308 USD
View
B+
Retailer 4
-
$392 USD
£309 GBP
View
Most Expensive
C
MOH London
LG752551082 · Oct 29
$1,364 USD
£1,074 GBP
View
4 more retailers have this diamond
Prices start from $276 USDSave up to $1,088 USD

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
$276 USD