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Round|Lab Grown|IGI

1.21ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG811638282

Shape and cutting style on the report: Round brilliant

Certificate IGI LG811638282

Diamond specifications and retailer prices

From $454 NZD
As of November 3, 2026
Save $2,704 NZD (86%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $3,158 NZD 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 D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG811638282 or 811638282. Listed at 20 retailers as of November 3, 2026, with prices from $454 to $3,158, a $2,704 spread on the same certified stone. Brilliant Earth lists it at $3,158. 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 angle35.4°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811638282
Dimensions6.87 × 6.82 × 4.19 mm
L/W Ratio1.01
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
6.87 mm6.82 mm1.21 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811638282
Side View
Table 58.0%Crown 35.4°Girdle: MediumPavilion 40.5°Culet: NoneDepth 61.3%

Caratlytics Score

How it works →
A+
Exceptional
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: $3,158 NZD|Low: $454 NZD|High: $3,708 NZD|Avg: $1,407 NZD|-14.8%
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
Retailer 18
Retailer 19
November 5, 2026
Retailer 15$454 NZD
Retailer 18$509 NZD
Retailer 3$527 NZD
Retailer 4$564 NZD
Retailer 10$568 NZD
Retailer 7$852 NZD
Retailer 13$942 NZD
Retailer 5$946 NZD
Retailer 6$979 NZD
Retailer 2$1,063 NZD
Retailer 11$1,265 NZD
Retailer 16$1,733 NZD
Retailer 19$1,813 NZD
Retailer 9$1,845 NZD
Retailer 17$1,904 NZD
Retailer 8$2,012 NZD
Retailer 12$2,253 NZD
Retailer 14$2,546 NZD
Brilliant Earth$3,158 NZD

30 data points across 19 retailers

20 retailers$454 NZD to $3,158 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
Retailer 6
-
$578 NZD
View
Price last confirmed 59 days ago
A
Retailer 7
-
$852 NZD
View
A
Retailer 8
-
$942 NZD
View
A
Retailer 9
-
$946 NZD
View
A
Retailer 10
-
$979 NZD
View
A
Retailer 11
-
$1,063 NZD
View
B+
Retailer 12
-
$1,265 NZD
View
B+
Retailer 13
-
$1,733 NZD
View
B+
Retailer 14
-
$1,813 NZD
View
B+
Retailer 15
-
$1,845 NZD
View
B+
Retailer 16
-
$1,904 NZD
View
B+
Retailer 17
-
$2,012 NZD
View
B+
Retailer 18
-
$2,253 NZD
View
B+
Retailer 19
-
$2,546 NZD
View
Most Expensive
B
Brilliant Earth
21422798A · Nov 4
$3,158 NZD
$1,780 USD
View
19 more retailers have this diamond
Prices start from $454 NZDSave up to $2,704 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