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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 $168 USD
As of November 2, 2026
Save $932 USD (85%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,100 USD at Brilliant Earth · As of November 2, 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 18 retailers as of November 2, 2026, with prices from $168 to $1,100, a $932 spread on the same certified stone. Brilliant Earth lists it at $1,100. 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

1.09
Carat
D
Color
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

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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: Nov 2
Current: $1,100 USD|Low: $156 USD|High: $1,100 USD|Avg: $441 USD
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
November 2, 2026
Retailer 4$168 USD
Retailer 12$195 USD
Retailer 15$208 USD
Retailer 13$211 USD
Retailer 10$249 USD
Retailer 8$347 USD
Retailer 11$367 USD
Retailer 3$369 USD
Retailer 5$373 USD
Retailer 9$384 USD
Retailer 17$480 USD
Retailer 2$534 USD
Retailer 16$669 USD
Retailer 7$724 USD
Retailer 14$974 USD
Retailer 6$1,091 USD
Brilliant Earth$1,100 USD

35 data points across 17 retailers

18 retailers$168 USD to $1,100 USD

A
Cheapest Retailer
-
$168 USD
A
Retailer 2
-
$195 USD
View
Retailer 3
-
$202 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
$208 USD
View
A
Retailer 5
-
$211 USD
View
Final sale: no returns
A
Retailer 6
-
$249 USD
£196 GBP
View
A
Retailer 7
-
$347 USD
€330 EUR
View
B+
Retailer 8
-
$367 USD
£289 GBP
View
B+
Retailer 9
-
$369 USD
View
B+
Retailer 10
-
$373 USD
View
B+
Retailer 11
-
$384 USD
£302 GBP
View
B+
Retailer 12
-
$480 USD
A$738 AUD
View
B+
Retailer 13
-
$534 USD
View
B
Retailer 14
-
$669 USD
View
B
Retailer 15
-
$724 USD
View
B
Retailer 16
-
$974 USD
£767 GBP
View
B
Retailer 17
-
$1,091 USD
View
Most Expensive
B
Brilliant Earth
20750167A · Nov 2
$1,100 USD
View
17 more retailers have this diamond
Prices start from $168 USDSave up to $932 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
1.09ct Marquise
$168 USD