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Marquise|Lab Grown|IGI

1.31ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG524239249

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG524239249

Diamond specifications and retailer prices

From $312 USD
As of November 1, 2026
Save $1,134 USD (78%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,446 USD at Reve Diamonds · As of November 1, 2026
View at Reve Diamonds

About this 1.31ct lab-grown marquise diamond

This 1.31ct lab-grown marquise 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 top-tier cut grade and certified by IGI LG524239249 or 524239249. Listed at 17 retailers as of November 1, 2026, with prices from $312 to $1,446, a $1,134 spread on the same certified stone. Reve Diamonds lists it at $1,446. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.31
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG524239249
Dimensions11.15 × 5.86 × 3.56 mm
L/W Ratio1.90
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
11.15 mm5.86 mm1.31 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG524239249
Side View
Table 59.0%Crown 34.1°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 60.8%

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: Nov 1
Current: $610 USD|Low: $268 USD|High: $1,403 USD|Avg: $639 USD|+3.2%
Retailer 1
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
November 1, 2026
Retailer 13$279 USD
Retailer 6$312 USD
Retailer 4$324 USD
Retailer 14$346 USD
Retailer 8$492 USD
Retailer 9$505 USD
Retailer 10$567 USD
Retailer 3$571 USD
Retailer 1$610 USD
Retailer 5$674 USD
Retailer 12$884 USD
Retailer 2$1,113 USD
Retailer 7$1,390 USD
Retailer 11$1,394 USD

39 data points across 14 retailers

17 retailers$312 USD to $1,446 USD

Retailer 1
-
$279 USD
Price last confirmed 11 days ago
A
Retailer 2
-
$312 USD
View
Final sale: no returns
Retailer 3
-
$324 USD
View
Price last confirmed 12 days ago
Retailer 4
-
$346 USD
View
Price last confirmed 11 days ago
Retailer 5
-
$346 USD
View
Price last confirmed 16 days ago
B+
Retailer 6
-
$492 USD
View
B+
Retailer 7
-
$505 USD
View
B+
Retailer 8
-
$567 USD
€540 EUR
View
B+
Retailer 9
-
$571 USD
View
B+
Retailer 10
-
$610 USD
£480 GBP
View
B+
Retailer 11
-
$674 USD
View
B
Retailer 12
-
$884 USD
View
Retailer 13
-
$1,113 USD
View
Price last confirmed 10 days ago
B
Retailer 14
-
$1,163 USD
View
B
Retailer 15
-
$1,390 USD
View
B
Retailer 16
-
$1,394 USD
£1,098 GBP
View
Most Expensive
B
Reve Diamonds
4DB39F678 · Nov 1
$1,446 USD
View
16 more retailers have this diamond
Prices start from $312 USDSave up to $1,134 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 Marquise
$312 USD