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Radiant|Lab Grown|IGI

1.31ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG602388297

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG602388297

Diamond specifications and retailer prices

From $285 USD
As of October 30, 2026
Save $1,895 USD (87%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $2,180 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.31ct lab-grown radiant diamond

This 1.31ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG602388297 or 602388297. Listed at 22 retailers as of October 29, 2026, with prices from $285 to $2,180, a $1,895 spread on the same certified stone. Brilliant Earth lists it at $2,180. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.31
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43°
Pavilion angle35.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG602388297
Dimensions7.96 × 5.44 × 3.63 mm
L/W Ratio1.46
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
7.96 mm5.44 mm1.31 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG602388297
Side View
Table 66.0%Crown 43°Girdle: MediumPavilion 35.8°Culet: NoneDepth 66.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $2,180 USD|Low: $274 USD|High: $2,180 USD|Avg: $748 USD|+0.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
October 30, 2026
Retailer 3$285 USD
Retailer 7$331 USD
Retailer 4$354 USD
Retailer 8$354 USD
Retailer 14$376 USD
Retailer 15$510 USD
Retailer 16$578 USD
Retailer 6$582 USD
Retailer 13$607 USD
Retailer 2$623 USD
Retailer 9$681 USD
Retailer 12$860 USD
Retailer 17$1,086 USD
Retailer 5$1,136 USD
Retailer 10$1,187 USD
Retailer 11$1,425 USD
Brilliant Earth$2,180 USD

39 data points across 17 retailers

22 retailers$285 USD to $2,180 USD

A
Cheapest Retailer
-
$285 USD
A
Retailer 2
-
$319 USD
View
Final sale: no returns
A
Retailer 3
-
$331 USD
View
A
Retailer 4
-
$354 USD
View
A
Retailer 5
-
$354 USD
View
A
Retailer 6
-
$376 USD
£296 GBP
View
A
Retailer 7
-
$510 USD
View
A
Retailer 8
-
$578 USD
€550 EUR
View
A
Retailer 9
-
$582 USD
View
A
Retailer 10
-
$607 USD
ZAR 9,813 ZAR
View
A
Retailer 11
-
$623 USD
£491 GBP
View
A
Retailer 12
-
$681 USD
View
B+
Retailer 13
-
$860 USD
A$1,323 AUD
View
B+
Retailer 14
-
$917 USD
View
B+
Retailer 15
-
$1,086 USD
View
B+
Retailer 16
-
$1,136 USD
View
B+
Retailer 17
-
$1,186 USD
View
B+
Retailer 18
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$1,187 USD
A$1,826 AUD
View
B
Retailer 19
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$1,305 USD
View
B
Retailer 20
-
$1,372 USD
£1,080 GBP
View
B+
Retailer 21
-
$1,425 USD
£1,122 GBP
View
Most Expensive
B
Brilliant Earth
8263391A · Oct 29
$2,180 USD
View
21 more retailers have this diamond
Prices start from $285 USDSave up to $1,895 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 Radiant
$285 USD