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Marquise|Lab Grown|IGI

1.59ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG778674580

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG778674580

Diamond specifications and retailer prices

From $658 AUD
$462 USD
As of October 30, 2026
Save $890 AUD (58%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,548 AUD at MOH London · As of October 29, 2026
View at MOH London

About this 1.59ct lab-grown marquise diamond

This 1.59ct lab-grown marquise sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG778674580 or 778674580. Listed at 5 retailers as of October 29, 2026, with prices from $658 to $1,548, a $890 spread on the same certified stone. MOH London lists it at $1,548. 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

1.59
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle42.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778674580
Dimensions11.00 × 6.28 × 4.04 mm
L/W Ratio1.75
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.00 mm6.28 mm1.59 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778674580
Side View
Table 60.0%Crown 33.1°Girdle: STK-THKPavilion 42.3°Culet: NoneDepth 64.3%

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 30
Current: $1,548 AUD|Low: $622 AUD|High: $1,558 AUD|Avg: $953 AUD|-0.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 31, 2026
Retailer 4$658 AUD
Retailer 2$713 AUD
Retailer 5$713 AUD
Retailer 3$857 AUD
Retailer 6$1,324 AUD
MOH London$1,548 AUD

24 data points across 6 retailers

5 retailers$658 AUD to $1,548 AUD

B+
Cheapest Retailer
-
$658 AUD
$462 USD
A
Retailer 2
-
$713 AUD
£394 GBP
View
B+
Retailer 3
-
$713 AUD
$501 USD
View
B+
Retailer 4
-
$857 AUD
$602 USD
View
Most Expensive
B
MOH London
LG778674580 · Oct 29
$1,548 AUD
£856 GBP
View
4 more retailers have this diamond
Prices start from $658 AUDSave up to $890 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
1.59ct Marquise
$658 AUD