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Marquise|Lab Grown|IGI

1.63ct I SI1 Marquise Lab Grown Diamond

ID • I/SI1 • IGI LG436046743

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG436046743

Diamond specifications and retailer prices

From $1,406 USD
As of October 27, 2026
Save $3,275 USD (70%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $4,681 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.63ct lab-grown marquise diamond

This 1.63ct lab-grown marquise sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436046743 or 436046743. Listed at 11 retailers as of October 27, 2026, with prices from $1,406 to $4,681, a $3,275 spread on the same certified stone. MOH London lists it at $4,681. 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

1.63
Carat
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.7°
Pavilion angle41.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436046743
Dimensions11.29 × 6.18 × 3.96 mm
L/W Ratio1.83
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
11.29 mm6.18 mm1.63 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG436046743
Side View
Table 57.5%Crown 35.7°Girdle: MED-THKPavilion 41.7°Culet: NoneDepth 64.1%

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: Oct 27
Current: $4,681 USD|Low: $1,349 USD|High: $4,719 USD|Avg: $2,483 USD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 2$1,406 USD
Retailer 4$1,460 USD
Retailer 7$1,574 USD
Retailer 5$1,631 USD
Retailer 8$1,800 USD
Retailer 3$1,819 USD
Retailer 10$2,229 USD
Retailer 6$2,575 USD
Retailer 9$2,959 USD
Retailer 11$4,669 USD
MOH London$4,681 USD

13 data points across 11 retailers

11 retailers$1,406 USD to $4,681 USD

A
Cheapest Retailer
-
$1,406 USD
B+
Retailer 2
-
$1,460 USD
View
B+
Retailer 3
-
$1,529 USD
View
B+
Retailer 4
-
$1,574 USD
View
Final sale: no returns
B+
Retailer 5
-
$1,631 USD
View
Price last confirmed 16 days ago
B+
Retailer 6
-
$1,631 USD
View
B+
Retailer 7
-
$1,800 USD
View
B
Retailer 8
-
$2,575 USD
View
B
Retailer 9
-
$2,959 USD
View
B
Retailer 10
-
$3,056 USD
View
Most Expensive
B
MOH London
LG436046743 · Oct 29
$4,681 USD
£3,686 GBP
View
10 more retailers have this diamond
Prices start from $1,406 USDSave up to $3,275 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
1.63ct Marquise
$1,406 USD