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Radiant|Lab Grown|IGI

1.31ct E SI1 Radiant Lab Grown Diamond

GD • E/SI1 • IGI LG602355231

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

Certificate IGI LG602355231

Diamond specifications and retailer prices

From $158 USD
As of October 27, 2026
Save $1,362 USD (90%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $1,520 USD at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

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 SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG602355231 or 602355231. Listed at 10 retailers as of October 27, 2026, with prices from $158 to $1,520, a $1,362 spread on the same certified stone. Do Amore Diamonds lists it at $1,520. 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
E
Color
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.3°
Pavilion angle34°
OriginLab Grown
Grading LabIGI
CertificateIGI LG602355231
Dimensions7.82 × 5.30 × 3.59 mm
L/W Ratio1.48
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
7.82 mm5.30 mm1.31 ctE / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG602355231
Side View
Table 66.0%Crown 42.3°Girdle: MediumPavilion 34°Culet: NoneDepth 67.7%

Caratlytics Score

How it works →
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 27
Current: $1,520 USD|Low: $129 USD|High: $1,650 USD|Avg: $692 USD|+1.3%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 18, 2026
Retailer 7$158 USD
Retailer 10$177 USD
Retailer 8$355 USD
Retailer 3$368 USD
Retailer 11$488 USD
Retailer 12$502 USD
Retailer 5$547 USD
Retailer 6$665 USD
Retailer 4$694 USD
Retailer 13$900 USD
Retailer 2$1,016 USD
Retailer 9$1,220 USD
Do Amore Diamonds$1,520 USD

14 data points across 13 retailers

10 retailers$158 USD to $1,520 USD

A
Cheapest Retailer
-
$158 USD
A
Retailer 2
-
$177 USD
View
Final sale: no returns
A
Retailer 3
-
$183 USD
View
B
Retailer 4
-
$355 USD
View
B
Retailer 5
-
$665 USD
View
B
Retailer 6
-
$695 USD
View
B
Retailer 7
-
$900 USD
View
Retailer 8
-
$1,016 USD
£800 GBP
View
Price last confirmed 9 days ago
C
Retailer 9
-
$1,220 USD
View
Most Expensive
C
Do Amore Diamonds
27-89282A6CB · Oct 29
$1,520 USD
View
9 more retailers have this diamond
Prices start from $158 USDSave up to $1,362 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
$158 USD