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Round|Lab Grown|IGI

1.21ct F FL Round Lab Grown Diamond

ID • F/FL • IGI LG788625368

Shape and cutting style on the report: Round brilliant

Certificate IGI LG788625368

Diamond specifications and retailer prices

From $379 AUD
As of November 4, 2026
Save $2,001 AUD (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $2,381 AUD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG788625368 or 788625368. Listed at 18 retailers as of November 4, 2026, with prices from $379 to $2,381, a $2,001 spread on the same certified stone. Brilliant Earth lists it at $2,381. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
F
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG788625368
Dimensions6.92 × 6.86 × 4.22 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
6.92 mm6.86 mm1.21 ctF / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG788625368
Side View
Table 57.0%Crown 33.6°Girdle: MediumPavilion 41.1°Culet: NoneDepth 61.2%

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: Nov 4
Current: $2,381 AUD|Low: $379 AUD|High: $3,407 AUD|Avg: $1,162 AUD|-30.1%
Brilliant Earth
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
Retailer 15
Retailer 16
Retailer 17
November 5, 2026
Retailer 11$379 AUD
Retailer 3$395 AUD
Retailer 8$450 AUD
Retailer 7$677 AUD
Retailer 13$711 AUD
Retailer 5$746 AUD
Retailer 6$775 AUD
Retailer 2$787 AUD
Retailer 9$808 AUD
Retailer 14$908 AUD
Retailer 17$1,359 AUD
Retailer 15$1,360 AUD
Retailer 16$1,428 AUD
Retailer 4$1,464 AUD
Retailer 10$1,684 AUD
Retailer 12$1,932 AUD
Brilliant Earth$2,381 AUD

34 data points across 17 retailers

18 retailers$379 AUD to $2,381 AUD

A
Cheapest Retailer
-
$379 AUD
Final sale: no returns
A
Retailer 2
-
$395 AUD
View
Retailer 3
-
$450 AUD
View
Price last confirmed 11 days ago
Retailer 4
-
$456 AUD
View
Price last confirmed 65 days ago
A
Retailer 5
-
$677 AUD
View
A
Retailer 6
-
$711 AUD
View
A
Retailer 7
-
$746 AUD
View
A
Retailer 8
-
$775 AUD
View
A
Retailer 9
-
$787 AUD
View
B+
Retailer 10
-
$808 AUD
View
B+
Retailer 11
-
$908 AUD
View
B+
Retailer 12
-
$1,359 AUD
View
B
Retailer 13
-
$1,360 AUD
View
B+
Retailer 14
-
$1,428 AUD
View
B+
Retailer 15
-
$1,464 AUD
View
B
Retailer 16
-
$1,684 AUD
View
B
Retailer 17
-
$1,932 AUD
View
Most Expensive
B
Brilliant Earth
21419099A · Nov 4
$2,381 AUD
$1,670 USD
View
17 more retailers have this diamond
Prices start from $379 AUDSave up to $2,001 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
$379 AUD