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Marquise|Lab Grown|IGI

1.09ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG851626094

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG851626094

Diamond specifications and retailer prices

From €158 EUR
$176 USD
As of November 1, 2026
Save €415 EUR (73%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: €573 EUR at Brilliant Earth · As of October 31, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG851626094 or 851626094. Listed at 3 retailers as of October 31, 2026, with prices from €158 to €573, a €415 spread on the same certified stone. Brilliant Earth lists it at €573. 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG851626094
Dimensions10.86 × 5.23 × 3.34 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
10.86 mm5.23 mm1.09 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG851626094
Side View
Table 63.0%Crown 35.3°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 63.9%

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: Nov 1
Current: €573 EUR|Low: €158 EUR|High: €573 EUR|Avg: €424 EUR
Brilliant Earth
Retailer 2
Retailer 3
November 1, 2026
Retailer 2€158 EUR
Retailer 3€320 EUR
Brilliant Earth€573 EUR

6 data points across 3 retailers

3 retailers€158 EUR to €573 EUR

A
Cheapest Retailer
-
€158 EUR
$176 USD
Final sale: no returns
B+
Retailer 2
-
€320 EUR
£281 GBP
View
Most Expensive
B
Brilliant Earth
22321797A · Oct 31
€573 EUR
$640 USD
View
2 more retailers have this diamond
Prices start from €158 EURSave up to €415 EUR

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
€158 EUR