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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 $393 USD
As of October 29, 2026
Save $2,317 USD (85%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $2,710 USD at Brilliant Earth · As of October 28, 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 28, 2026, with prices from $393 to $2,710, a $2,317 spread on the same certified stone. Brilliant Earth lists it at $2,710. 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
Color
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

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: $2,710 USD|Low: $440 USD|High: $2,790 USD|Avg: $1,058 USD|-2.9%
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 29, 2026
Retailer 3$440 USD
Retailer 10$488 USD
Retailer 8$635 USD
Retailer 4$655 USD
Retailer 12$719 USD
Retailer 2$795 USD
Retailer 7$838 USD
Retailer 6$855 USD
Retailer 9$1,172 USD
Retailer 11$1,553 USD
Retailer 5$1,916 USD
Brilliant Earth$2,710 USD

41 data points across 12 retailers

22 retailers$393 USD to $2,710 USD

A
Cheapest Retailer
-
$393 USD
A
Retailer 2
-
$440 USD
View
Final sale: no returns
A
Retailer 3
-
$440 USD
View
A
Retailer 4
-
$488 USD
View
A
Retailer 5
-
$488 USD
View
A
Retailer 6
-
$538 USD
HK$4,200 HKD
View
A
Retailer 7
-
$635 USD
View
B+
Retailer 8
-
$655 USD
View
B+
Retailer 9
-
$719 USD
View
B+
Retailer 10
-
$760 USD
View
B+
Retailer 11
-
$795 USD
£626 GBP
View
B+
Retailer 12
-
$838 USD
ZAR 13,540 ZAR
View
B+
Retailer 13
-
$855 USD
€814 EUR
View
B
Retailer 14
-
$1,172 USD
View
B
Retailer 15
-
$1,553 USD
SGD 2,098 SGD
View
B
Retailer 16
-
$1,568 USD
View
B
Retailer 17
-
$1,601 USD
View
Price last confirmed 80 days ago
B
Retailer 18
-
$1,604 USD
View
B
Retailer 19
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$1,786 USD
View
B
Retailer 20
-
$1,810 USD
View
B
Retailer 21
-
$1,916 USD
£1,509 GBP
View
Most Expensive
B
Brilliant Earth
19001902A · Oct 28
$2,710 USD
View
21 more retailers have this diamond
Prices start from $393 USDSave up to $2,317 USD

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
$393 USD