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Marquise|Lab Grown|IGI

1.55ct I SI1 Marquise Lab Grown Diamond

ID • I/SI1 • IGI LG436046738

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG436046738

Diamond specifications and retailer prices

From $930 USD
As of October 31, 2026
Save $4,057 USD (81%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $4,987 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.55ct lab-grown marquise diamond

This 1.55ct 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 LG436046738 or 436046738. Listed at 12 retailers as of October 31, 2026, with prices from $930 to $4,987, a $4,057 spread on the same certified stone. MOH London lists it at $4,987. 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

1.55
Carat
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436046738
Dimensions11.23 × 6.17 × 3.90 mm
L/W Ratio1.82
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
11.23 mm6.17 mm1.55 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436046738
Side View
Table 58.5%Crown 36.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 63.2%

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 31
Current: $4,987 USD|Low: $930 USD|High: $5,047 USD|Avg: $2,317 USD
MOH London
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
November 2, 2026
Retailer 8$930 USD
Retailer 9$1,338 USD
Retailer 13$1,456 USD
Retailer 15$1,498 USD
Retailer 10$1,552 USD
Retailer 14$1,552 USD
Retailer 3$1,725 USD
Retailer 7$1,952 USD
Retailer 5$2,133 USD
Retailer 2$2,216 USD
Retailer 11$2,453 USD
Retailer 4$2,893 USD
Retailer 12$2,909 USD
Retailer 6$4,444 USD
MOH London$4,987 USD

39 data points across 15 retailers

12 retailers$930 USD to $4,987 USD

A
Cheapest Retailer
-
$930 USD
B+
Retailer 2
-
$1,338 USD
View
B+
Retailer 3
-
$1,456 USD
View
B+
Retailer 4
-
$1,498 USD
View
Final sale: no returns
Retailer 5
-
$1,552 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
$1,552 USD
View
B+
Retailer 7
-
$1,725 USD
View
B
Retailer 8
-
$2,216 USD
£1,745 GBP
View
B
Retailer 9
-
$2,453 USD
View
B
Retailer 10
-
$2,893 USD
View
B
Retailer 11
-
$2,909 USD
View
Most Expensive
B
MOH London
LG436046738 · Nov 1
$4,987 USD
£3,927 GBP
View
11 more retailers have this diamond
Prices start from $930 USDSave up to $4,057 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
1.55ct Marquise
$930 USD