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Cushion|Lab Grown|IGI

1.31ct G SI1 Cushion Lab Grown Diamond

GD • G/SI1 • IGI LG625480540

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

Certificate IGI LG625480540

Diamond specifications and retailer prices

From $350 USD
As of November 6, 2026
Save $1,270 USD (78%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $1,620 USD at Do Amore Diamonds · As of November 6, 2026
View at Do Amore Diamonds

About this 1.31ct lab-grown cushion diamond

This 1.31ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG625480540 or 625480540. Listed at 7 retailers as of November 6, 2026, with prices from $350 to $1,620, a $1,270 spread on the same certified stone. Do Amore Diamonds lists it at $1,620. 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

1.31
Carat
G
Color
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG625480540
Dimensions6.40 × 6.39 × 4.24 mm
L/W Ratio1.00
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
6.40 mm6.39 mm1.31 ctG / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG625480540
Side View
Table 60.0%Crown 34.3°Girdle: MED-THKPavilion 40.4°Culet: NoneDepth 66.4%

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: Nov 6
Current: $1,620 USD|Low: $350 USD|High: $1,620 USD|Avg: $703 USD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 7$350 USD
Retailer 5$375 USD
Retailer 2$414 USD
Retailer 6$462 USD
Retailer 4$625 USD
Retailer 3$1,076 USD
Do Amore Diamonds$1,620 USD

43 data points across 7 retailers

7 retailers$350 USD to $1,620 USD

B+
Cheapest Retailer
-
$350 USD
B
Retailer 2
-
$375 USD
View
B+
Retailer 3
-
$414 USD
View
B+
Retailer 4
-
$462 USD
View
B+
Retailer 5
-
$625 USD
View
B
Retailer 6
-
$1,076 USD
View
Most Expensive
C
Do Amore Diamonds
27-E53E6D30B · Nov 6
$1,620 USD
View
6 more retailers have this diamond
Prices start from $350 USDSave up to $1,270 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+
1.31ct Cushion
$350 USD