CaratHunter
Plans
Cushion|Lab Grown|IGI

1.31ct F IF Cushion Lab Grown Diamond

ID • F/IF • IGI LG816655903

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG816655903

Diamond specifications and retailer prices

From $477 USD
As of November 4, 2026
Save $1,168 USD (71%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,645 USD at Rare Carat · As of November 1, 2026
View at Rare Carat

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 F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816655903 or 816655903. Listed at 5 retailers as of November 1, 2026, with prices from $477 to $1,645, a $1,168 spread on the same certified stone. Rare Carat lists it at $1,645. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.31
Carat
F
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle34.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816655903
Dimensions7.72 × 5.49 × 3.55 mm
L/W Ratio1.41
Girdle conditionFaceted
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
7.72 mm5.49 mm1.31 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816655903
Side View
Table 65.0%Crown 36.3°Girdle: THN-STKPavilion 34.5°Culet: NoneDepth 64.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $1,645 USD|Low: $477 USD|High: $2,480 USD|Avg: $1,139 USD
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 5$477 USD
Retailer 4$525 USD
Retailer 2$765 USD
Retailer 3$1,121 USD
Rare Carat$1,645 USD
Retailer 6$2,480 USD

23 data points across 6 retailers

5 retailers$477 USD to $1,645 USD

A
Cheapest Retailer
-
$477 USD
A
Retailer 2
-
$525 USD
View
A
Retailer 3
-
$765 USD
View
A
Retailer 4
-
$1,121 USD
View
Most Expensive
B+
Rare Carat
ME-738-167 · Nov 1
$1,645 USD
View
4 more retailers have this diamond
Prices start from $477 USDSave up to $1,168 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.

A
1.31ct Cushion
$477 USD