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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 $143 USD
As of October 29, 2026
Save $691 USD (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $834 USD 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 $143 to $834, a $691 spread on the same certified stone. MOH London lists it at $834. 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

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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: $834 USD|Low: $138 USD|High: $841 USD|Avg: $367 USD|-0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 7$143 USD
Retailer 2$166 USD
Retailer 10$178 USD
Retailer 11$178 USD
Retailer 6$305 USD
Retailer 8$311 USD
Retailer 5$411 USD
Retailer 4$420 USD
Retailer 3$448 USD
Retailer 9$571 USD
MOH London$834 USD

37 data points across 11 retailers

16 retailers$143 USD to $834 USD

A
Cheapest Retailer
-
$143 USD
A
Retailer 2
-
$160 USD
View
Final sale: no returns
A
Retailer 3
-
$166 USD
View
A
Retailer 4
-
$178 USD
View
A
Retailer 5
-
$178 USD
View
B+
Retailer 6
-
$240 USD
View
A
Retailer 7
-
$305 USD
£240 GBP
View
A
Retailer 8
-
$311 USD
€296 EUR
View
B+
Retailer 9
-
$376 USD
View
B+
Retailer 10
-
$411 USD
£324 GBP
View
B+
Retailer 11
-
$420 USD
View
B+
Retailer 12
-
$426 USD
View
B+
Retailer 13
-
$448 USD
View
Retailer 14
-
$546 USD
View
Price last confirmed 36 days ago
B
Retailer 15
-
$571 USD
View
Most Expensive
B
MOH London
LG780687717 · Oct 29
$834 USD
£657 GBP
View
15 more retailers have this diamond
Prices start from $143 USDSave up to $691 USD

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
$143 USD