CaratHunter
Plans
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 $236 AUD
As of November 5, 2026
Save $1,127 AUD (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,362 AUD at MOH London · As of November 4, 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 November 4, 2026, with prices from $236 to $1,362, a $1,127 spread on the same certified stone. MOH London lists it at $1,362. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $1,362 AUD|Low: $226 AUD|High: $1,382 AUD|Avg: $640 AUD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 7$236 AUD
Retailer 8$293 AUD
Retailer 9$400 AUD
Retailer 4$506 AUD
Retailer 2$511 AUD
Retailer 3$564 AUD
Retailer 10$649 AUD
Retailer 5$963 AUD
Retailer 6$993 AUD
MOH London$1,362 AUD

44 data points across 10 retailers

17 retailers$236 AUD to $1,362 AUD

A
Cheapest Retailer
-
$236 AUD
A
Retailer 2
-
$263 AUD
View
Final sale: no returns
A
Retailer 3
-
$273 AUD
View
A
Retailer 4
-
$293 AUD
View
Retailer 5
-
$293 AUD
View
Price last confirmed 12 days ago
A
Retailer 6
-
$329 AUD
View
B+
Retailer 7
-
$400 AUD
View
A
Retailer 8
-
$506 AUD
View
A
Retailer 9
-
$511 AUD
View
A
Retailer 10
-
$530 AUD
View
A
Retailer 11
-
$564 AUD
View
Retailer 12
-
$643 AUD
View
Price last confirmed 47 days ago
B+
Retailer 13
-
$649 AUD
View
B
Retailer 14
-
$940 AUD
View
B
Retailer 15
-
$963 AUD
View
B
Retailer 16
-
$993 AUD
View
Most Expensive
B
MOH London
LG567369590 · Nov 4
$1,362 AUD
£751 GBP
View
16 more retailers have this diamond
Prices start from $236 AUDSave up to $1,127 AUD

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
$236 AUD