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Marquise|Lab Grown|IGI

1.09ct E FL Marquise Lab Grown Diamond

EX • E/FL • IGI LG787621431

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG787621431

Diamond specifications and retailer prices

From $422 USD
HK$3,300 HKD
As of October 30, 2026
Save $1,178 USD (74%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,600 USD at Brilliant Earth · As of October 30, 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 E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG787621431 or 787621431. Listed at 13 retailers as of October 30, 2026, with prices from $422 to $1,600, a $1,178 spread on the same certified stone. Brilliant Earth lists it at $1,600. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.09
Carat
E
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG787621431
Dimensions10.72 × 5.51 × 3.38 mm
L/W Ratio1.95
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
10.72 mm5.51 mm1.09 ctE / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG787621431
Side View
Table 59.0%Crown 33.9°Girdle: MediumPavilion 40.7°Culet: NoneDepth 61.3%

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 30
Current: $1,600 USD|Low: $422 USD|High: $2,590 USD|Avg: $1,095 USD|-26.9%
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
October 30, 2026
Retailer 10$422 USD
Retailer 3$432 USD
Retailer 13$506 USD
Retailer 7$510 USD
Retailer 11$513 USD
Retailer 9$525 USD
Retailer 2$581 USD
Retailer 12$671 USD
Retailer 4$987 USD
Retailer 14$1,154 USD
Retailer 8$1,232 USD
Retailer 5$1,554 USD
Brilliant Earth$1,600 USD
Retailer 6$2,150 USD

43 data points across 14 retailers

13 retailers$422 USD to $1,600 USD

A
Cheapest Retailer
-
$422 USD
HK$3,300 HKD
A
Retailer 2
-
$432 USD
View
A
Retailer 3
-
$506 USD
View
A
Retailer 4
-
$510 USD
€486 EUR
View
A
Retailer 5
-
$513 USD
View
A
Retailer 6
-
$525 USD
ZAR 8,488 ZAR
View
A
Retailer 7
-
$581 USD
£457 GBP
View
A
Retailer 8
-
$671 USD
View
B+
Retailer 9
-
$987 USD
A$1,518 AUD
View
B+
Retailer 10
-
$1,154 USD
View
B+
Retailer 11
-
$1,232 USD
£970 GBP
View
B
Retailer 12
-
$1,554 USD
View
Most Expensive
B
Brilliant Earth
20870155Y · Oct 30
$1,600 USD
View
12 more retailers have this diamond
Prices start from $422 USDSave up to $1,178 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
$422 USD