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Radiant|Lab Grown|IGI

1.21ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG780696509

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG780696509

Diamond specifications and retailer prices

From $415 NZD
As of November 4, 2026
Save $3,080 NZD (88%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $3,495 NZD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.21ct lab-grown radiant diamond

This 1.21ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780696509 or 780696509. Listed at 21 retailers as of November 4, 2026, with prices from $415 to $3,495, a $3,080 spread on the same certified stone. Brilliant Earth lists it at $3,495. 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
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle28°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780696509
Dimensions7.62 × 5.24 × 3.48 mm
L/W Ratio1.45
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
7.62 mm5.24 mm1.21 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780696509
Side View
Table 62.0%Crown 28°Girdle: MediumPavilion 35.5°Culet: NoneDepth 66.4%

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: Nov 4
Current: $3,495 NZD|Low: $397 NZD|High: $4,364 NZD|Avg: $1,255 NZD|-19.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 5, 2026
Retailer 15$415 NZD
Retailer 8$461 NZD
Retailer 5$481 NZD
Retailer 6$514 NZD
Retailer 16$514 NZD
Retailer 12$853 NZD
Retailer 4$871 NZD
Retailer 10$887 NZD
Retailer 7$938 NZD
Retailer 2$960 NZD
Retailer 9$1,258 NZD
Retailer 3$1,652 NZD
Retailer 14$1,657 NZD
Retailer 11$2,058 NZD
Retailer 13$3,273 NZD
Brilliant Earth$3,495 NZD

45 data points across 16 retailers

21 retailers$415 NZD to $3,495 NZD

A
Cheapest Retailer
-
$415 NZD
A
Retailer 2
-
$461 NZD
View
Final sale: no returns
A
Retailer 3
-
$481 NZD
View
Retailer 4
-
$514 NZD
View
Price last confirmed 11 days ago
A
Retailer 5
-
$514 NZD
View
A
Retailer 6
-
$568 NZD
View
A
Retailer 7
-
$853 NZD
View
A
Retailer 8
-
$871 NZD
View
A
Retailer 9
-
$887 NZD
View
A
Retailer 10
-
$938 NZD
View
A
Retailer 11
-
$960 NZD
View
A
Retailer 12
-
$1,258 NZD
View
B+
Retailer 13
-
$1,354 NZD
View
B+
Retailer 14
-
$1,652 NZD
View
B+
Retailer 15
-
$1,657 NZD
View
B+
Retailer 16
-
$1,660 NZD
View
B+
Retailer 17
-
$1,744 NZD
View
B+
Retailer 18
-
$2,058 NZD
View
B
Retailer 19
-
$2,306 NZD
View
Retailer 20
-
$3,273 NZD
View
Price last confirmed 18 days ago
Most Expensive
B
Brilliant Earth
19340393A · Nov 4
$3,495 NZD
$1,970 USD
View
20 more retailers have this diamond
Prices start from $415 NZDSave up to $3,080 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 Radiant
$415 NZD