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Round|Lab Grown|IGI

1.09ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG770639336

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770639336

Diamond specifications and retailer prices

From €127 EUR
As of November 5, 2026
Save €610 EUR (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: €738 EUR at MOH London · As of November 4, 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 LG770639336 or 770639336. Listed at 18 retailers as of November 4, 2026, with prices from €127 to €738, a €610 spread on the same certified stone. MOH London lists it at €738. 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
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770639336
Dimensions6.62 × 6.65 × 4.04 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.62 mm6.65 mm1.09 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770639336
Side View
Table 61.0%Crown 33.6°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 60.8%

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 5
Current: €738 EUR|Low: €123 EUR|High: €749 EUR|Avg: €346 EUR|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 8€127 EUR
Retailer 9€159 EUR
Retailer 4€268 EUR
Retailer 2€279 EUR
Retailer 10€295 EUR
Retailer 6€303 EUR
Retailer 3€350 EUR
Retailer 5€445 EUR
Retailer 7€537 EUR
MOH London€738 EUR

40 data points across 10 retailers

18 retailers€127 EUR to €738 EUR

A
Cheapest Retailer
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€127 EUR
A
Retailer 2
-
€148 EUR
View
A
Retailer 3
-
€159 EUR
View
Retailer 4
-
€159 EUR
View
Price last confirmed 12 days ago
A
Retailer 5
-
€268 EUR
View
A
Retailer 6
-
€279 EUR
View
B+
Retailer 7
-
€295 EUR
View
A
Retailer 8
-
€303 EUR
View
B+
Retailer 9
-
€303 EUR
View
B+
Retailer 10
-
€350 EUR
View
B+
Retailer 11
-
€380 EUR
View
B+
Retailer 12
-
€404 EUR
View
B
Retailer 13
-
€445 EUR
View
B
Retailer 14
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€445 EUR
View
B
Retailer 15
-
€509 EUR
View
B
Retailer 16
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€537 EUR
View
B
Retailer 17
-
€558 EUR
View
Most Expensive
B
MOH London
LG770639336 · Nov 4
€738 EUR
£652 GBP
View
17 more retailers have this diamond
Prices start from €127 EURSave up to €610 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
€127 EUR