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Round|Lab Grown|IGI

1.09ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG803603992

Shape and cutting style on the report: Round brilliant

Certificate IGI LG803603992

Diamond specifications and retailer prices

From €133 EUR
$149 USD
As of October 29, 2026
Save €798 EUR (86%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: €932 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 LG803603992 or 803603992. Listed at 17 retailers as of October 29, 2026, with prices from €133 to €932, a €798 spread on the same certified stone. Reve Diamonds lists it at €932. 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
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG803603992
Dimensions6.65 × 6.62 × 4.05 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.65 mm6.62 mm1.09 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG803603992
Side View
Table 57.0%Crown 34.3°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.1%

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: Oct 29
Current: €542 EUR|Low: €149 EUR|High: €932 EUR|Avg: €376 EUR
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Reve Diamonds
October 31, 2026
Retailer 8€158 EUR
Retailer 9€167 EUR
Retailer 7€277 EUR
Retailer 3€287 EUR
Retailer 12€294 EUR
Retailer 10€310 EUR
Retailer 11€330 EUR
Retailer 4€412 EUR
Retailer 6€445 EUR
Retailer 5€456 EUR
Retailer 1€542 EUR
Retailer 13€592 EUR
Retailer 2€778 EUR
Reve Diamonds€932 EUR

36 data points across 14 retailers

17 retailers€133 EUR to €932 EUR

A
Cheapest Retailer
-
€133 EUR
$149 USD
A
Retailer 2
-
€158 EUR
$176 USD
View
A
Retailer 3
-
€166 EUR
$185 USD
View
A
Retailer 4
-
€166 EUR
$185 USD
View
A
Retailer 5
-
€167 EUR
$187 USD
View
Final sale: no returns
A
Retailer 6
-
€277 EUR
$310 USD
View
A
Retailer 7
-
€287 EUR
View
A
Retailer 8
-
€294 EUR
£258 GBP
View
B+
Retailer 9
-
€310 EUR
$346 USD
View
B+
Retailer 10
-
€330 EUR
£290 GBP
View
B+
Retailer 11
-
€412 EUR
A$708 AUD
View
B
Retailer 12
-
€445 EUR
$497 USD
View
Retailer 13
-
€456 EUR
$510 USD
View
Price last confirmed 15 days ago
B
Retailer 14
-
€542 EUR
$606 USD
View
B
Retailer 15
-
€592 EUR
$662 USD
View
B
Retailer 16
-
€778 EUR
£684 GBP
View
Most Expensive
B
Reve Diamonds
FDA9E6D5D · Oct 30
€932 EUR
$1,041 USD
View
16 more retailers have this diamond
Prices start from €133 EURSave up to €798 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
€133 EUR