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Round|Lab Grown|IGI

1.09ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG451057063

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451057063

Diamond specifications and retailer prices

From €573 EUR
$640 USD
As of October 31, 2026
Save €3,494 EUR (86%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €4,067 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451057063 or 451057063. Listed at 13 retailers as of October 29, 2026, with prices from €573 to €4,067, a €3,494 spread on the same certified stone. MOH London lists it at €4,067. 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
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451057063
Dimensions6.53 × 6.56 × 4.09 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.53 mm6.56 mm1.09 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451057063
Side View
Table 56.5%Crown 35.9°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 62.5%

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 31
Current: €4,067 EUR|Low: €573 EUR|High: €4,100 EUR|Avg: €1,737 EUR|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 30, 2026
Retailer 2€573 EUR
Retailer 9€1,086 EUR
Retailer 13€1,181 EUR
Retailer 3€1,216 EUR
Retailer 10€1,259 EUR
Retailer 12€1,259 EUR
Retailer 4€1,414 EUR
Retailer 7€1,653 EUR
Retailer 5€1,764 EUR
Retailer 11€1,997 EUR
Retailer 8€2,155 EUR
Retailer 14€2,360 EUR
Retailer 6€2,412 EUR
MOH London€4,067 EUR

37 data points across 14 retailers

13 retailers€573 EUR to €4,067 EUR

A
Cheapest Retailer
-
€573 EUR
$640 USD
B+
Retailer 2
-
€1,086 EUR
$1,213 USD
View
B+
Retailer 3
-
€1,181 EUR
$1,319 USD
View
B+
Retailer 4
-
€1,216 EUR
$1,358 USD
View
Final sale: no returns
B+
Retailer 5
-
€1,259 EUR
$1,407 USD
View
Retailer 6
-
€1,259 EUR
$1,407 USD
View
Price last confirmed 19 days ago
B+
Retailer 7
-
€1,414 EUR
$1,580 USD
View
B+
Retailer 8
-
€1,653 EUR
£1,454 GBP
View
B
Retailer 9
-
€1,997 EUR
$2,231 USD
View
B
Retailer 10
-
€2,155 EUR
View
B
Retailer 11
-
€2,360 EUR
$2,637 USD
View
B
Retailer 12
-
€2,412 EUR
$2,695 USD
View
Most Expensive
B
MOH London
LG451057063 · Oct 29
€4,067 EUR
£3,578 GBP
View
12 more retailers have this diamond
Prices start from €573 EURSave up to €3,494 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
€573 EUR