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Round|Lab Grown|IGI

1.21ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG447099659

Shape and cutting style on the report: Round brilliant

Certificate IGI LG447099659

Diamond specifications and retailer prices

From €472 EUR
As of November 5, 2026
Save €3,589 EUR (88%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €4,061 EUR at MOH London · As of November 5, 2026
View at MOH London

About this 1.21ct lab-grown round diamond

This 1.21ct 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 LG447099659 or 447099659. Listed at 13 retailers as of November 5, 2026, with prices from €472 to €4,061, a €3,589 spread on the same certified stone. MOH London lists it at €4,061. 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

1.21
Carat
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG447099659
Dimensions6.94 × 6.96 × 4.14 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.94 mm6.96 mm1.21 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG447099659
Side View
Table 56.5%Crown 33.3°Girdle: THN-MEDPavilion 40.2°Culet: NoneDepth 59.5%

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: Nov 5
Current: €4,061 EUR|Low: €472 EUR|High: €4,125 EUR|Avg: €1,898 EUR|-1.3%
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
November 6, 2026
Retailer 9€472 EUR
Retailer 8€1,229 EUR
Retailer 13€1,337 EUR
Retailer 3€1,376 EUR
Retailer 10€1,426 EUR
Retailer 12€1,426 EUR
Retailer 4€1,577 EUR
Retailer 2€1,855 EUR
Retailer 5€1,939 EUR
Retailer 11€2,251 EUR
Retailer 7€2,435 EUR
Retailer 6€2,587 EUR
Retailer 14€2,672 EUR
MOH London€4,061 EUR

44 data points across 14 retailers

13 retailers€472 EUR to €4,061 EUR

A
Cheapest Retailer
-
€472 EUR
B+
Retailer 2
-
€1,229 EUR
View
B+
Retailer 3
-
€1,337 EUR
View
B+
Retailer 4
-
€1,376 EUR
View
Final sale: no returns
B+
Retailer 5
-
€1,426 EUR
View
Retailer 6
-
€1,426 EUR
View
Price last confirmed 25 days ago
B
Retailer 7
-
€1,577 EUR
View
B+
Retailer 8
-
€1,855 EUR
View
B
Retailer 9
-
€2,251 EUR
View
Retailer 10
-
€2,435 EUR
View
Price last confirmed 8 days ago
B
Retailer 11
-
€2,587 EUR
View
B
Retailer 12
-
€2,672 EUR
View
Most Expensive
B
MOH London
LG447099659 · Nov 5
€4,061 EUR
£3,589 GBP
View
12 more retailers have this diamond
Prices start from €472 EURSave up to €3,589 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
1.21ct Round
€472 EUR