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Round|Lab Grown|IGI

1.09ct E SI2 Round Lab Grown Diamond

ID • E/SI2 • IGI LG780687717

Shape and cutting style on the report: Round brilliant

Certificate IGI LG780687717

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)
16 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 E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG780687717 or 780687717. Listed at 16 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
E
Color
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780687717
Dimensions6.61 × 6.57 × 4.11 mm
L/W Ratio1.01
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
6.61 mm6.57 mm1.09 ctE / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780687717
Side View
Table 56.0%Crown 35.6°Girdle: MediumPavilion 41.1°Culet: NoneDepth 62.4%

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: €747 EUR|Low: €124 EUR|High: €753 EUR|Avg: €325 EUR|-0.8%
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 31, 2026
Retailer 11€128 EUR
Retailer 2€147 EUR
Retailer 8€149 EUR
Retailer 3€159 EUR
Retailer 5€163 EUR
Retailer 12€278 EUR
Retailer 6€280 EUR
Retailer 10€368 EUR
Retailer 9€376 EUR
Retailer 4€401 EUR
Retailer 7€523 EUR
MOH London€747 EUR

36 data points across 12 retailers

16 retailers€128 EUR to €747 EUR

A
Cheapest Retailer
-
€128 EUR
$143 USD
A
Retailer 2
-
€147 EUR
$164 USD
View
Final sale: no returns
A
Retailer 3
-
€149 EUR
$166 USD
View
A
Retailer 4
-
€159 EUR
$178 USD
View
A
Retailer 5
-
€163 EUR
$182 USD
View
B+
Retailer 6
-
€215 EUR
$240 USD
View
A
Retailer 7
-
€278 EUR
View
A
Retailer 8
-
€280 EUR
£247 GBP
View
B+
Retailer 9
-
€337 EUR
$376 USD
View
B+
Retailer 10
-
€368 EUR
£324 GBP
View
B+
Retailer 11
-
€376 EUR
$420 USD
View
B+
Retailer 12
-
€381 EUR
$426 USD
View
B+
Retailer 13
-
€401 EUR
$448 USD
View
Retailer 14
-
€489 EUR
$546 USD
View
Price last confirmed 37 days ago
B
Retailer 15
-
€523 EUR
$584 USD
View
Most Expensive
B
MOH London
LG780687717 · Oct 29
€747 EUR
£657 GBP
View
15 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