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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 $454 NZD
As of November 3, 2026
Save $3,504 NZD (89%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $3,958 NZD 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 $454 to $3,958, a $3,504 spread on the same certified stone. Helzberg Diamonds lists it at $3,958. 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 angle35.5°
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 3
Current: $3,958 NZD|Low: $454 NZD|High: $3,958 NZD|Avg: $1,517 NZD
Helzberg Diamonds
Retailer 2
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November 5, 2026
Retailer 19$454 NZD
Retailer 22$509 NZD
Retailer 4$527 NZD
Retailer 5$564 NZD
Retailer 9$568 NZD
Retailer 7$852 NZD
Retailer 16$892 NZD
Retailer 17$942 NZD
Retailer 8$946 NZD
Retailer 6$979 NZD
Retailer 15$1,013 NZD
Retailer 2$1,063 NZD
Retailer 12$1,265 NZD
Retailer 20$1,733 NZD
Retailer 3$1,813 NZD
Retailer 11$1,845 NZD
Retailer 21$1,904 NZD
Retailer 10$2,012 NZD
Retailer 13$2,253 NZD
Retailer 18$2,546 NZD
Retailer 14$3,158 NZD
Helzberg Diamonds$3,958 NZD

21 data points across 22 retailers

22 retailers$454 NZD to $3,958 NZD

A
Cheapest Retailer
-
$454 NZD
A
Retailer 2
-
$509 NZD
View
Final sale: no returns
A
Retailer 3
-
$527 NZD
View
A
Retailer 4
-
$564 NZD
View
Retailer 5
-
$568 NZD
View
Price last confirmed 11 days ago
A
Retailer 6
-
$852 NZD
View
A
Retailer 7
-
$892 NZD
View
A
Retailer 8
-
$942 NZD
View
A
Retailer 9
-
$946 NZD
View
A
Retailer 10
-
$979 NZD
View
A
Retailer 11
-
$1,013 NZD
View
A
Retailer 12
-
$1,063 NZD
View
B+
Retailer 13
-
$1,265 NZD
View
B+
Retailer 14
-
$1,733 NZD
View
B+
Retailer 15
-
$1,813 NZD
View
B+
Retailer 16
-
$1,845 NZD
View
B+
Retailer 17
-
$1,904 NZD
View
B+
Retailer 18
-
$2,012 NZD
View
B+
Retailer 19
-
$2,253 NZD
View
B
Retailer 20
-
$2,546 NZD
View
B
Retailer 21
-
$3,158 NZD
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMJLGHP · Nov 4
$3,958 NZD
$2,231 USD
View
21 more retailers have this diamond
Prices start from $454 NZDSave up to $3,504 NZD

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
$454 NZD