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Marquise|Lab Grown|IGI

1.09ct D SI1 Marquise Lab Grown Diamond

EX • D/SI1 • IGI LG817695830

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG817695830

Diamond specifications and retailer prices

From $240 AUD
As of November 6, 2026
Save $1,331 AUD (85%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $1,571 AUD at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.09ct lab-grown marquise diamond

This 1.09ct lab-grown marquise sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG817695830 or 817695830. Listed at 19 retailers as of November 6, 2026, with prices from $240 to $1,571, a $1,331 spread on the same certified stone. Brilliant Earth lists it at $1,571. 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

1.09
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817695830
Dimensions10.94 × 5.27 × 3.28 mm
L/W Ratio2.08
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.94 mm5.27 mm1.09 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817695830
Side View
Table 62.0%Crown 37°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 62.2%

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: Nov 6
Current: $1,571 AUD|Low: $233 AUD|High: $1,571 AUD|Avg: $655 AUD|+0.9%
Brilliant Earth
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
Retailer 16
Retailer 17
Retailer 18
November 6, 2026
Retailer 5$240 AUD
Retailer 16$279 AUD
Retailer 17$297 AUD
Retailer 11$301 AUD
Retailer 12$353 AUD
Retailer 2$503 AUD
Retailer 13$523 AUD
Retailer 4$527 AUD
Retailer 6$533 AUD
Retailer 9$547 AUD
Retailer 3$684 AUD
Retailer 15$763 AUD
Retailer 10$821 AUD
Retailer 18$956 AUD
Retailer 8$1,034 AUD
Retailer 14$1,387 AUD
Retailer 7$1,558 AUD
Brilliant Earth$1,571 AUD

32 data points across 18 retailers

19 retailers$240 AUD to $1,571 AUD

A
Cheapest Retailer
-
$240 AUD
A
Retailer 2
-
$279 AUD
View
Retailer 3
-
$289 AUD
View
Price last confirmed 12 days ago
A
Retailer 4
-
$297 AUD
View
A
Retailer 5
-
$301 AUD
View
Final sale: no returns
A
Retailer 6
-
$353 AUD
View
Retailer 7
-
$503 AUD
View
B+
Retailer 8
-
$523 AUD
View
B+
Retailer 9
-
$527 AUD
View
B+
Retailer 10
-
$533 AUD
View
Retailer 11
-
$547 AUD
View
Price last confirmed 9 days ago
B+
Retailer 12
-
$684 AUD
View
B+
Retailer 13
-
$763 AUD
View
Retailer 14
-
$821 AUD
View
Price last confirmed 9 days ago
B
Retailer 15
-
$956 AUD
View
B
Retailer 16
-
$1,034 AUD
View
B
Retailer 17
-
$1,387 AUD
View
B
Retailer 18
-
$1,558 AUD
View
Most Expensive
B
Brilliant Earth
20750167A · Nov 6
$1,571 AUD
$1,100 USD
View
18 more retailers have this diamond
Prices start from $240 AUDSave up to $1,331 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
1.09ct Marquise
$240 AUD