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Round|Lab Grown|IGI

1.21ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG567369590

Shape and cutting style on the report: Round brilliant

Certificate IGI LG567369590

Diamond specifications and retailer prices

From €148 EUR
$165 USD
As of October 29, 2026
Save €709 EUR (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: €857 EUR at MOH London · As of October 26, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG567369590 or 567369590. Listed at 17 retailers as of October 26, 2026, with prices from €148 to €857, a €709 spread on the same certified stone. MOH London lists it at €857. 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
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG567369590
Dimensions6.85 × 6.81 × 4.23 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
6.85 mm6.81 mm1.21 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG567369590
Side View
Table 57.5%Crown 35.3°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.0%

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: €857 EUR|Low: €141 EUR|High: €866 EUR|Avg: €369 EUR
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
November 1, 2026
Retailer 10€148 EUR
Retailer 5€165 EUR
Retailer 3€171 EUR
Retailer 11€183 EUR
Retailer 12€251 EUR
Retailer 6€317 EUR
Retailer 2€324 EUR
Retailer 7€358 EUR
Retailer 13€406 EUR
Retailer 4€589 EUR
Retailer 8€603 EUR
Retailer 9€622 EUR
MOH London€857 EUR

45 data points across 13 retailers

17 retailers€148 EUR to €857 EUR

A
Cheapest Retailer
-
€148 EUR
$165 USD
A
Retailer 2
-
€165 EUR
$184 USD
View
Final sale: no returns
A
Retailer 3
-
€171 EUR
$191 USD
View
A
Retailer 4
-
€183 EUR
$205 USD
View
A
Retailer 5
-
€183 EUR
$205 USD
View
A
Retailer 6
-
€206 EUR
HK$1,800 HKD
View
B+
Retailer 7
-
€251 EUR
$280 USD
View
A
Retailer 8
-
€317 EUR
View
A
Retailer 9
-
€324 EUR
£285 GBP
View
A
Retailer 10
-
€332 EUR
$371 USD
View
A
Retailer 11
-
€358 EUR
£315 GBP
View
Retailer 12
-
€403 EUR
$450 USD
View
Price last confirmed 41 days ago
B+
Retailer 13
-
€406 EUR
$454 USD
View
B
Retailer 14
-
€589 EUR
$658 USD
View
B
Retailer 15
-
€603 EUR
SGD 911 SGD
View
B
Retailer 16
-
€622 EUR
$695 USD
View
Most Expensive
B
MOH London
LG567369590 · Oct 26
€857 EUR
£754 GBP
View
16 more retailers have this diamond
Prices start from €148 EURSave up to €709 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
€148 EUR