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Round|Lab Grown|IGI

1.21ct E SI2 Round Lab Grown Diamond

EX • E/SI2 • IGI LG772660992

Shape and cutting style on the report: Round brilliant

Certificate IGI LG772660992

Diamond specifications and retailer prices

From $233 AUD
$164 USD
As of October 29, 2026
Save $1,128 AUD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,361 AUD 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 LG772660992 or 772660992. Listed at 15 retailers as of October 29, 2026, with prices from $233 to $1,361, a $1,128 spread on the same certified stone. MOH London lists it at $1,361. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.4°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG772660992
Dimensions6.81 × 6.70 × 4.20 mm
L/W Ratio1.02
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
6.81 mm6.70 mm1.21 ctE / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG772660992
Side View
Table 61.0%Crown 37.4°Girdle: MED-THKPavilion 40.8°Culet: NoneDepth 62.2%

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: $1,361 AUD|Low: $225 AUD|High: $1,370 AUD|Avg: $599 AUD|-0.4%
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 31, 2026
Retailer 12$233 AUD
Retailer 13$262 AUD
Retailer 6$285 AUD
Retailer 5$289 AUD
Retailer 2$498 AUD
Retailer 9$510 AUD
Retailer 3$521 AUD
Retailer 10$641 AUD
Retailer 14$645 AUD
Retailer 4$649 AUD
Retailer 8$671 AUD
Retailer 11$743 AUD
Retailer 7$797 AUD
MOH London$1,361 AUD

33 data points across 14 retailers

15 retailers$233 AUD to $1,361 AUD

A
Cheapest Retailer
-
$233 AUD
$164 USD
A
Retailer 2
-
$262 AUD
$184 USD
View
Final sale: no returns
Retailer 3
-
$285 AUD
$200 USD
View
Price last confirmed 46 days ago
A
Retailer 4
-
$289 AUD
$203 USD
View
A
Retailer 5
-
$498 AUD
€333 EUR
View
B+
Retailer 6
-
$510 AUD
£282 GBP
View
B+
Retailer 7
-
$521 AUD
$366 USD
View
Retailer 8
-
$641 AUD
$450 USD
View
Price last confirmed 10 days ago
B+
Retailer 9
-
$645 AUD
$453 USD
View
B+
Retailer 10
-
$649 AUD
$456 USD
View
B+
Retailer 11
-
$671 AUD
£371 GBP
View
Retailer 12
-
$687 AUD
$483 USD
View
Price last confirmed 83 days ago
B
Retailer 13
-
$743 AUD
$522 USD
View
B+
Retailer 14
-
$797 AUD
$560 USD
View
Most Expensive
B
MOH London
LG772660992 · Oct 29
$1,361 AUD
£753 GBP
View
14 more retailers have this diamond
Prices start from $233 AUDSave up to $1,128 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
$233 AUD