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Round|Lab Grown|IGI

1.21ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG781617863

Shape and cutting style on the report: Round brilliant

Certificate IGI LG781617863

Diamond specifications and retailer prices

From $559 AUD
$393 USD
As of October 29, 2026
Save $3,298 AUD (85%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $3,858 AUD at Brilliant Earth · As of October 29, 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 D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG781617863 or 781617863. Listed at 22 retailers as of October 29, 2026, with prices from $559 to $3,858, a $3,298 spread on the same certified stone. Brilliant Earth lists it at $3,858. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG781617863
Dimensions6.82 × 6.88 × 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
6.82 mm6.88 mm1.21 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG781617863
Side View
Table 56.0%Crown 35.2°Girdle: MediumPavilion 40.5°Culet: NoneDepth 61.7%

Caratlytics Score

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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: $3,858 AUD|Low: $626 AUD|High: $3,858 AUD|Avg: $1,421 AUD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 3$626 AUD
Retailer 10$695 AUD
Retailer 8$904 AUD
Retailer 4$932 AUD
Retailer 12$1,024 AUD
Retailer 2$1,135 AUD
Retailer 7$1,193 AUD
Retailer 6$1,217 AUD
Retailer 9$1,668 AUD
Retailer 11$2,210 AUD
Retailer 5$2,728 AUD
Brilliant Earth$3,858 AUD

42 data points across 12 retailers

22 retailers$559 AUD to $3,858 AUD

A
Cheapest Retailer
-
$559 AUD
$393 USD
A
Retailer 2
-
$626 AUD
$440 USD
View
Final sale: no returns
A
Retailer 3
-
$626 AUD
$440 USD
View
A
Retailer 4
-
$695 AUD
$488 USD
View
A
Retailer 5
-
$695 AUD
$488 USD
View
A
Retailer 6
-
$765 AUD
HK$4,200 HKD
View
A
Retailer 7
-
$904 AUD
$635 USD
View
B+
Retailer 8
-
$932 AUD
$655 USD
View
B+
Retailer 9
-
$1,024 AUD
$719 USD
View
B+
Retailer 10
-
$1,082 AUD
$760 USD
View
B+
Retailer 11
-
$1,135 AUD
£628 GBP
View
B+
Retailer 12
-
$1,193 AUD
ZAR 13,540 ZAR
View
B+
Retailer 13
-
$1,217 AUD
€814 EUR
View
B
Retailer 14
-
$1,668 AUD
$1,172 USD
View
B
Retailer 15
-
$2,210 AUD
SGD 2,098 SGD
View
B
Retailer 16
-
$2,232 AUD
$1,568 USD
View
Retailer 17
-
$2,279 AUD
$1,601 USD
View
Price last confirmed 82 days ago
B
Retailer 18
-
$2,284 AUD
$1,604 USD
View
B
Retailer 19
-
$2,543 AUD
$1,786 USD
View
B
Retailer 20
-
$2,577 AUD
$1,810 USD
View
B
Retailer 21
-
$2,728 AUD
£1,509 GBP
View
Most Expensive
B
Brilliant Earth
19001902A · Oct 29
$3,858 AUD
$2,710 USD
View
21 more retailers have this diamond
Prices start from $559 AUDSave up to $3,298 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
$559 AUD