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1.22ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG783639397

Shape and cutting style on the report: Round brilliant

Certificate IGI LG783639397

Diamond specifications and retailer prices

From $375 USD
As of October 30, 2026
Save $712 USD (66%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $1,087 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.22ct lab-grown round diamond

This 1.22ct 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 LG783639397 or 783639397. Listed at 3 retailers as of October 29, 2026, with prices from $375 to $1,087, a $712 spread on the same certified stone. MOH London lists it at $1,087. 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

1.22
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG783639397
Dimensions6.87 × 6.81 × 4.18 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.87 mm6.81 mm1.22 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG783639397
Side View
Table 60.0%Crown 34.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $1,087 USD|Low: $350 USD|High: $1,093 USD|Avg: $656 USD|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 29, 2026
Retailer 2$375 USD
Retailer 4$415 USD
Retailer 3$534 USD
Retailer 5$916 USD
MOH London$1,087 USD

10 data points across 5 retailers

3 retailers$375 USD to $1,087 USD

A
Cheapest Retailer
-
$375 USD
B
Retailer 2
-
$534 USD
View
Most Expensive
B
MOH London
LG783639397 · Oct 29
$1,087 USD
£856 GBP
View
2 more retailers have this diamond
Prices start from $375 USDSave up to $712 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
1.22ct Round
$375 USD