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Round|Lab Grown|IGI

1.21ct E SI2 Round Lab Grown Diamond

ID • E/SI2 • IGI LG766645929

Shape and cutting style on the report: Round brilliant

Certificate IGI LG766645929

Diamond specifications and retailer prices

From $162 USD
As of October 29, 2026
Save $784 USD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $946 USD at MOH London · As of October 29, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG766645929 or 766645929. Listed at 15 retailers as of October 29, 2026, with prices from $162 to $946, a $784 spread on the same certified stone. MOH London lists it at $946. 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
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG766645929
Dimensions6.89 × 6.85 × 4.14 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
6.89 mm6.85 mm1.21 ctE / SI2
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI LG766645929
Side View
Table 57.0%Crown 34.6°Girdle: MediumPavilion 40.1°Culet: NoneDepth 60.3%

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: $946 USD|Low: $156 USD|High: $968 USD|Avg: $422 USD|-2.2%
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 12$162 USD
Retailer 13$182 USD
Retailer 6$198 USD
Retailer 5$201 USD
Retailer 9$348 USD
Retailer 8$355 USD
Retailer 3$364 USD
Retailer 10$450 USD
Retailer 14$451 USD
Retailer 4$456 USD
Retailer 7$466 USD
Retailer 11$544 USD
Retailer 2$560 USD
MOH London$946 USD

34 data points across 14 retailers

15 retailers$162 USD to $946 USD

A
Cheapest Retailer
-
$162 USD
A
Retailer 2
-
$182 USD
View
Final sale: no returns
Retailer 3
-
$198 USD
View
Price last confirmed 45 days ago
A
Retailer 4
-
$201 USD
View
A
Retailer 5
-
$348 USD
€331 EUR
View
B+
Retailer 6
-
$355 USD
£279 GBP
View
B+
Retailer 7
-
$364 USD
View
Retailer 8
-
$450 USD
View
Price last confirmed 9 days ago
B+
Retailer 9
-
$451 USD
View
B+
Retailer 10
-
$456 USD
View
B+
Retailer 11
-
$466 USD
£367 GBP
View
Retailer 12
-
$483 USD
View
Price last confirmed 82 days ago
B
Retailer 13
-
$544 USD
View
B+
Retailer 14
-
$560 USD
View
Most Expensive
B
MOH London
LG766645929 · Oct 29
$946 USD
£745 GBP
View
14 more retailers have this diamond
Prices start from $162 USDSave up to $784 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
1.21ct Round
$162 USD