CaratHunter
Plans
Round|Lab Grown|IGI

1.21ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG840635019

Shape and cutting style on the report: Round brilliant

Certificate IGI LG840635019

Diamond specifications and retailer prices

From $256 USD
As of November 3, 2026
Save $1,975 USD (89%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $2,231 USD at Helzberg Diamonds · As of November 4, 2026
View at Helzberg Diamonds

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 LG840635019 or 840635019. Listed at 22 retailers as of November 3, 2026, with prices from $256 to $2,231, a $1,975 spread on the same certified stone. Helzberg Diamonds lists it at $2,231. 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 angle35.5°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840635019
Dimensions6.78 × 6.81 × 4.20 mm
L/W Ratio1.00
Girdle conditionFaceted
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
6.78 mm6.81 mm1.21 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840635019
Side View
Table 58.0%Crown 35.5°Girdle: MediumPavilion 40.6°Culet: NoneDepth 61.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 3
Current: $2,231 USD|Low: $256 USD|High: $2,231 USD|Avg: $855 USD
Helzberg Diamonds
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
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
November 5, 2026
Retailer 19$256 USD
Retailer 22$287 USD
Retailer 4$297 USD
Retailer 5$318 USD
Retailer 9$320 USD
Retailer 7$480 USD
Retailer 16$503 USD
Retailer 17$531 USD
Retailer 8$533 USD
Retailer 6$552 USD
Retailer 15$571 USD
Retailer 2$599 USD
Retailer 12$713 USD
Retailer 20$977 USD
Retailer 3$1,022 USD
Retailer 11$1,040 USD
Retailer 21$1,073 USD
Retailer 10$1,134 USD
Retailer 13$1,270 USD
Retailer 18$1,435 USD
Retailer 14$1,780 USD
Helzberg Diamonds$2,231 USD

21 data points across 22 retailers

22 retailers$256 USD to $2,231 USD

A
Cheapest Retailer
-
$256 USD
A
Retailer 2
-
$287 USD
View
Final sale: no returns
A
Retailer 3
-
$297 USD
View
A
Retailer 4
-
$318 USD
View
Retailer 5
-
$320 USD
View
Price last confirmed 11 days ago
A
Retailer 6
-
$480 USD
View
A
Retailer 7
-
$503 USD
View
A
Retailer 8
-
$531 USD
View
A
Retailer 9
-
$533 USD
View
A
Retailer 10
-
$552 USD
View
A
Retailer 11
-
$571 USD
View
A
Retailer 12
-
$599 USD
View
B+
Retailer 13
-
$713 USD
View
B+
Retailer 14
-
$977 USD
View
B+
Retailer 15
-
$1,022 USD
View
B+
Retailer 16
-
$1,040 USD
View
B+
Retailer 17
-
$1,073 USD
View
B+
Retailer 18
-
$1,134 USD
View
B+
Retailer 19
-
$1,270 USD
View
B
Retailer 20
-
$1,435 USD
View
B
Retailer 21
-
$1,780 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMJLGHP · Nov 4
$2,231 USD
View
21 more retailers have this diamond
Prices start from $256 USDSave up to $1,975 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
$256 USD