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Marquise|Lab Grown|IGI

1.09ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG835609047

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG835609047

Diamond specifications and retailer prices

From €183 EUR
HK$1,600 HKD
As of November 1, 2026
Save €296 EUR (62%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €735 EUR at MOH London · As of October 25, 2026
View at MOH London

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 LG835609047 or 835609047. Listed at 11 retailers as of October 28, 2026, with a 161% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle32.3°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG835609047
Dimensions10.51 × 5.55 × 3.35 mm
L/W Ratio1.89
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.51 mm5.55 mm1.09 ctE / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG835609047
Side View
Table 60.0%Crown 32.3°Girdle: MED-STKPavilion 41°Culet: NoneDepth 60.4%

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 1
Current: €735 EUR|Low: €141 EUR|High: €753 EUR|Avg: €352 EUR|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 27, 2026
Retailer 12€141 EUR
Retailer 8€183 EUR
Retailer 2€204 EUR
Retailer 5€268 EUR
Retailer 7€271 EUR
Retailer 11€292 EUR
Retailer 3€301 EUR
Retailer 6€338 EUR
Retailer 10€396 EUR
Retailer 4€434 EUR
Retailer 9€479 EUR
MOH London€735 EUR

34 data points across 12 retailers

11 retailers€183 EUR to €479 EUR

A
Cheapest Retailer
-
€183 EUR
HK$1,600 HKD
A
Retailer 2
-
€204 EUR
£180 GBP
View
A
Retailer 3
-
€268 EUR
£236 GBP
View
A
Retailer 4
-
€271 EUR
View
Retailer 5
-
€292 EUR
$326 USD
View
Price last confirmed 7 days ago
A
Retailer 6
-
€301 EUR
$336 USD
View
B+
Retailer 7
-
€338 EUR
£297 GBP
View
B+
Retailer 8
-
€396 EUR
$442 USD
View
B
Retailer 9
-
€434 EUR
SGD 655 SGD
View
B+
Retailer 10
-
€479 EUR
$535 USD
View
Most Expensive
MOH London
LG835609047 · Oct 25
€735 EUR
£647 GBP
View
Price last confirmed 7 days ago
10 more retailers have this diamond
Prices start from €183 EURSave up to €296 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
€183 EUR