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Round|Lab Grown|IGI

1.21ct F SI1 Round Lab Grown Diamond

VG • F/SI1 • IGI LG763668397

Shape and cutting style on the report: Round brilliant

Certificate IGI LG763668397

Diamond specifications and retailer prices

From $234 AUD
As of November 1, 2026
Save $1,121 AUD (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,355 AUD at MOH London · As of November 1, 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 F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG763668397 or 763668397. Listed at 13 retailers as of November 1, 2026, with prices from $234 to $1,355, a $1,121 spread on the same certified stone. MOH London lists it at $1,355. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
Crown angle36.1°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG763668397
Dimensions6.92 × 6.90 × 4.05 mm
L/W Ratio1.00
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
6.92 mm6.90 mm1.21 ctF / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI LG763668397
Side View
Table 60.0%Crown 36.1°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 58.7%

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: Nov 1
Current: $1,355 AUD|Low: $221 AUD|High: $1,394 AUD|Avg: $598 AUD|-2.8%
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 6, 2026
Retailer 10$234 AUD
Retailer 11$262 AUD
Retailer 5$288 AUD
Retailer 4$290 AUD
Retailer 2$504 AUD
Retailer 8$505 AUD
Retailer 13$522 AUD
Retailer 3$537 AUD
Retailer 12$653 AUD
Retailer 6$655 AUD
Retailer 7$792 AUD
Retailer 9$800 AUD
MOH London$1,355 AUD

36 data points across 13 retailers

13 retailers$234 AUD to $1,355 AUD

A
Cheapest Retailer
-
$234 AUD
A
Retailer 2
-
$262 AUD
View
Final sale: no returns
Retailer 3
-
$288 AUD
View
Price last confirmed 53 days ago
Retailer 4
-
$290 AUD
View
Price last confirmed 13 days ago
B+
Retailer 5
-
$504 AUD
View
B+
Retailer 6
-
$505 AUD
View
B
Retailer 7
-
$522 AUD
View
B+
Retailer 8
-
$537 AUD
View
B+
Retailer 9
-
$653 AUD
View
B+
Retailer 10
-
$655 AUD
View
B
Retailer 11
-
$792 AUD
View
B
Retailer 12
-
$800 AUD
View
Most Expensive
B
MOH London
LG763668397 · Nov 1
$1,355 AUD
£733 GBP
View
12 more retailers have this diamond
Prices start from $234 AUDSave up to $1,121 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
$234 AUD