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Cushion|Lab Grown|IGI

2.51ct H SI1 Cushion Lab Grown Diamond

VG • H/SI1 • IGI LG510167161

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG510167161

Diamond specifications and retailer prices

From $1,640 USD
As of November 6, 2026
Save $3,422 USD (68%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $5,062 USD at MOH London · As of November 3, 2026
View at MOH London

About this 2.51ct lab-grown cushion diamond

This 2.51ct lab-grown cushion sits in the two to three carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG510167161 or 510167161. Listed at 4 retailers as of November 3, 2026, with prices from $1,640 to $5,062, a $3,422 spread on the same certified stone. MOH London lists it at $5,062. 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

2.51
Carat
H
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle38.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG510167161
Dimensions8.77 × 7.58 × 4.97 mm
L/W Ratio1.16
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
8.77 mm7.58 mm2.51 ctH / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG510167161
Side View
Table 67.5%Crown 35.5°Girdle: THN-MEDPavilion 38.5°Culet: NoneDepth 65.6%

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: Nov 6
Current: $5,062 USD|Low: $1,640 USD|High: $6,343 USD|Avg: $3,720 USD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4$1,640 USD
Retailer 6$1,945 USD
Retailer 2$2,766 USD
Retailer 3$4,508 USD
MOH London$5,062 USD
Retailer 5$6,343 USD

10 data points across 6 retailers

4 retailers$1,640 USD to $5,062 USD

B+
Cheapest Retailer
-
$1,640 USD
B
Retailer 2
-
$2,766 USD
View
B
Retailer 3
-
$4,508 USD
View
Most Expensive
B
MOH London
LG510167161 · Nov 3
$5,062 USD
£3,986 GBP
View
3 more retailers have this diamond
Prices start from $1,640 USDSave up to $3,422 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+
2.51ct Cushion
$1,640 USD