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Round|Lab Grown|IGI

1.09ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG818686663

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686663

Diamond specifications and retailer prices

From €128 EUR
$143 USD
As of October 29, 2026
Save €619 EUR (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €747 EUR at MOH London · As of October 29, 2026
View at MOH London

About this 1.09ct lab-grown round diamond

This 1.09ct lab-grown round sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG818686663 or 818686663. Listed at 15 retailers as of October 29, 2026, with prices from €128 to €747, a €619 spread on the same certified stone. MOH London lists it at €747. 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
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686663
Dimensions6.60 × 6.69 × 4.07 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.60 mm6.69 mm1.09 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686663
Side View
Table 56.0%Crown 35.3°Girdle: MediumPavilion 40.7°Culet: NoneDepth 61.4%

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: Oct 29
Current: €747 EUR|Low: €128 EUR|High: €796 EUR|Avg: €365 EUR|-6.1%
MOH London
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
October 30, 2026
Retailer 10€128 EUR
Retailer 2€149 EUR
Retailer 6€159 EUR
Retailer 7€168 EUR
Retailer 9€273 EUR
Retailer 11€282 EUR
Retailer 15€296 EUR
Retailer 14€304 EUR
Retailer 8€355 EUR
Retailer 12€381 EUR
Retailer 4€401 EUR
Retailer 13€439 EUR
Retailer 5€511 EUR
Retailer 3€561 EUR
MOH London€747 EUR

27 data points across 15 retailers

15 retailers€128 EUR to €747 EUR

A
Cheapest Retailer
-
€128 EUR
$143 USD
A
Retailer 2
-
€149 EUR
$166 USD
View
A
Retailer 3
-
€159 EUR
$178 USD
View
A
Retailer 4
-
€168 EUR
$188 USD
View
A
Retailer 5
-
€273 EUR
£240 GBP
View
A
Retailer 6
-
€282 EUR
View
A
Retailer 7
-
€296 EUR
$331 USD
View
A
Retailer 8
-
€304 EUR
$340 USD
View
B+
Retailer 9
-
€355 EUR
£312 GBP
View
B+
Retailer 10
-
€381 EUR
$426 USD
View
B+
Retailer 11
-
€401 EUR
$448 USD
View
B+
Retailer 12
-
€439 EUR
$490 USD
View
B+
Retailer 13
-
€511 EUR
$571 USD
View
B
Retailer 14
-
€561 EUR
$627 USD
View
Most Expensive
B
MOH London
LG818686663 · Oct 29
€747 EUR
£657 GBP
View
14 more retailers have this diamond
Prices start from €128 EURSave up to €619 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 Round
€128 EUR