CaratHunter
Plans
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 $1,324 AUD
$930 USD
As of October 31, 2026
Save $5,776 AUD (81%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $7,100 AUD 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 $1,324 to $7,100, a $5,776 spread on the same certified stone. MOH London lists it at $7,100. 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
Colour
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
undefined
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: $7,100 AUD|Low: $1,324 AUD|High: $7,185 AUD|Avg: $3,299 AUD
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$1,324 AUD
Retailer 9$1,905 AUD
Retailer 13$2,073 AUD
Retailer 15$2,133 AUD
Retailer 10$2,209 AUD
Retailer 14$2,209 AUD
Retailer 3$2,456 AUD
Retailer 7$2,779 AUD
Retailer 5$3,037 AUD
Retailer 2$3,155 AUD
Retailer 11$3,492 AUD
Retailer 4$4,118 AUD
Retailer 12$4,141 AUD
Retailer 6$6,326 AUD
MOH London$7,100 AUD

39 data points across 15 retailers

12 retailers$1,324 AUD to $7,100 AUD

A
Cheapest Retailer
-
$1,324 AUD
$930 USD
B+
Retailer 2
-
$1,905 AUD
$1,338 USD
View
B+
Retailer 3
-
$2,073 AUD
$1,456 USD
View
B+
Retailer 4
-
$2,133 AUD
$1,498 USD
View
Final sale: no returns
Retailer 5
-
$2,209 AUD
$1,552 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
$2,209 AUD
$1,552 USD
View
B+
Retailer 7
-
$2,456 AUD
$1,725 USD
View
B
Retailer 8
-
$3,155 AUD
£1,745 GBP
View
B
Retailer 9
-
$3,492 AUD
$2,453 USD
View
B
Retailer 10
-
$4,118 AUD
$2,893 USD
View
B
Retailer 11
-
$4,141 AUD
$2,909 USD
View
Most Expensive
B
MOH London
LG436046738 · Nov 1
$7,100 AUD
£3,927 GBP
View
11 more retailers have this diamond
Prices start from $1,324 AUDSave up to $5,776 AUD

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
$1,324 AUD