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Round|Lab Grown|IGI

1.09ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG770639320

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770639320

Diamond specifications and retailer prices

From €132 EUR
$148 USD
As of October 29, 2026
Save €788 EUR (86%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: €920 EUR at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1.09ct lab-grown round diamond

This 1.09ct lab-grown round 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 LG770639320 or 770639320. Listed at 18 retailers as of October 29, 2026, with prices from €132 to €920, a €788 spread on the same certified stone. Reve Diamonds lists it at €920. 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
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770639320
Dimensions6.61 × 6.63 × 4.05 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
6.61 mm6.63 mm1.09 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770639320
Side View
Table 59.0%Crown 34.3°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 61.2%

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: Oct 29
Current: €321 EUR|Low: €127 EUR|High: €779 EUR|Avg: €360 EUR|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 9€132 EUR
Retailer 3€154 EUR
Retailer 11€165 EUR
Retailer 5€284 EUR
Retailer 12€303 EUR
Retailer 6€312 EUR
Retailer 1€321 EUR
Retailer 2€386 EUR
Retailer 10€456 EUR
Retailer 4€529 EUR
Retailer 7€559 EUR
Retailer 8€770 EUR

42 data points across 12 retailers

18 retailers€132 EUR to €920 EUR

A
Cheapest Retailer
-
€132 EUR
$148 USD
A
Retailer 2
-
€148 EUR
$165 USD
View
Final sale: no returns
A
Retailer 3
-
€154 EUR
$172 USD
View
A
Retailer 4
-
€165 EUR
$184 USD
View
A
Retailer 5
-
€165 EUR
$184 USD
View
A
Retailer 6
-
€277 EUR
$309 USD
View
A
Retailer 7
-
€284 EUR
£250 GBP
View
B+
Retailer 8
-
€303 EUR
$339 USD
View
B+
Retailer 9
-
€312 EUR
View
A
Retailer 10
-
€321 EUR
£283 GBP
View
B+
Retailer 11
-
€386 EUR
$431 USD
View
B
Retailer 12
-
€422 EUR
$472 USD
View
B+
Retailer 13
-
€456 EUR
$510 USD
View
B
Retailer 14
-
€529 EUR
$591 USD
View
B
Retailer 15
-
€559 EUR
$624 USD
View
B
Retailer 16
-
€578 EUR
$646 USD
View
B
Retailer 17
-
€770 EUR
£677 GBP
View
Most Expensive
B
Reve Diamonds
0394E2DC1 · Oct 30
€920 EUR
$1,028 USD
View
17 more retailers have this diamond
Prices start from €132 EURSave up to €788 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
€132 EUR