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Cushion|Lab Grown|IGI

2.31ct D SI1 Cushion Lab Grown Diamond

VG • D/SI1 • IGI LG490174620

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG490174620

Diamond specifications and retailer prices

From $1,030 USD
As of October 31, 2026
Save $2,292 USD (69%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $3,322 USD at MOH London · As of October 29, 2026
View at MOH London

About this 2.31ct lab-grown cushion diamond

This 2.31ct lab-grown cushion sits in the two to three carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG490174620 or 490174620. Listed at 6 retailers as of October 29, 2026, with prices from $1,030 to $3,322, a $2,292 spread on the same certified stone. MOH London lists it at $3,322. 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

2.31
Carat
D
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.6°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG490174620
Dimensions8.23 × 6.87 × 4.78 mm
L/W Ratio1.20
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
8.23 mm6.87 mm2.31 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG490174620
Side View
Table 68.0%Crown 40.6°Girdle: STK-VTKPavilion 39.3°Culet: NoneDepth 69.6%

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: Oct 31
Current: $3,322 USD|Low: $1,030 USD|High: $3,348 USD|Avg: $1,815 USD|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 6$1,030 USD
Retailer 3$1,276 USD
Retailer 2$1,350 USD
Retailer 5$1,364 USD
Retailer 4$1,565 USD
Retailer 7$3,011 USD
MOH London$3,322 USD

42 data points across 7 retailers

6 retailers$1,030 USD to $3,322 USD

B+
Cheapest Retailer
-
$1,030 USD
B+
Retailer 2
-
$1,276 USD
€1,215 EUR
View
B+
Retailer 3
-
$1,350 USD
£1,063 GBP
View
B
Retailer 4
-
$1,364 USD
View
Retailer 5
-
$1,565 USD
View
Price last confirmed 11 days ago
Most Expensive
B
MOH London
LG490174620 · Oct 29
$3,322 USD
£2,616 GBP
View
5 more retailers have this diamond
Prices start from $1,030 USDSave up to $2,292 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+
2.31ct Cushion
$1,030 USD