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Radiant|Lab Grown|IGI

1.21ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG735580809

Shape and cutting style on the report: Cut cornered rectangular mixed cut

Certificate IGI LG735580809

Diamond specifications and retailer prices

From $520 NZD
As of November 4, 2026
Save $2,122 NZD (80%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $3,406 NZD at Rare Carat · As of September 28, 2026
View at Rare Carat

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 LG735580809 or 735580809. Listed at 20 retailers as of November 4, 2026, with a 408% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle25.5°
Pavilion angle33.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG735580809
Dimensions7.65 × 4.90 × 3.18 mm
L/W Ratio1.56
Culet sizeLong
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.65 mm4.90 mm1.21 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG735580809
Side View
Table 60.0%Crown 25.5°Girdle: MED-STKPavilion 33.4°Culet: LNGDepth 64.9%

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 4
Current: $3,406 NZD|Low: $498 NZD|High: $3,406 NZD|Avg: $1,332 NZD
Rare Carat
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
November 5, 2026
Retailer 15$520 NZD
Retailer 7$582 NZD
Retailer 5$603 NZD
Retailer 3$644 NZD
Retailer 6$644 NZD
Retailer 14$896 NZD
Retailer 13$922 NZD
Retailer 11$1,038 NZD
Retailer 10$1,111 NZD
Retailer 2$1,128 NZD
Retailer 9$1,728 NZD
Retailer 4$2,070 NZD
Retailer 12$2,155 NZD
Retailer 8$2,574 NZD
Rare Carat$3,406 NZD

45 data points across 15 retailers

20 retailers$520 NZD to $2,641 NZD

A
Cheapest Retailer
-
$520 NZD
A
Retailer 2
-
$582 NZD
View
Final sale: no returns
A
Retailer 3
-
$603 NZD
View
Retailer 4
-
$644 NZD
View
Price last confirmed 11 days ago
A
Retailer 5
-
$644 NZD
View
A
Retailer 6
-
$896 NZD
View
A
Retailer 7
-
$922 NZD
View
A
Retailer 8
-
$1,038 NZD
View
A
Retailer 9
-
$1,111 NZD
View
A
Retailer 10
-
$1,111 NZD
View
A
Retailer 11
-
$1,128 NZD
View
B+
Retailer 12
-
$1,728 NZD
View
B
Retailer 13
-
$2,070 NZD
View
B+
Retailer 14
-
$2,155 NZD
View
B
Retailer 15
-
$2,155 NZD
View
B
Retailer 16
-
$2,375 NZD
View
B
Retailer 17
-
$2,514 NZD
View
B
Retailer 18
-
$2,574 NZD
View
B
Retailer 19
-
$2,641 NZD
View
Most Expensive
Rare Carat
91965A_l_735580809 · Sep 28
$3,406 NZD
$1,920 USD
View
Price last confirmed 37 days ago
19 more retailers have this diamond
Prices start from $520 NZDSave up to $2,122 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
$520 NZD