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Radiant|Lab Grown|IGI

1.21ct E IF Radiant Lab Grown Diamond

VG • E/IF • IGI LG840640263

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

Certificate IGI LG840640263

Diamond specifications and retailer prices

From $507 NZD
$285 USD
As of November 1, 2026
Save $3,635 NZD (88%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $4,141 NZD at Brilliant Earth · As of October 31, 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG840640263 or 840640263. Listed at 15 retailers as of October 31, 2026, with prices from $507 to $4,141, a $3,635 spread on the same certified stone. Brilliant Earth lists it at $4,141. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
E
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle48.5°
Pavilion angle34.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840640263
Dimensions7.23 × 5.19 × 3.53 mm
L/W Ratio1.39
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
7.23 mm5.19 mm1.21 ctE / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840640263
Side View
Table 61.0%Crown 48.5°Girdle: STK-THKPavilion 34.4°Culet: NoneDepth 68.0%

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 1
Current: $2,167 NZD|Low: $507 NZD|High: $2,419 NZD|Avg: $1,357 NZD|-3.7%
Retailer 1
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
November 1, 2026
Retailer 10$507 NZD
Retailer 7$572 NZD
Retailer 14$583 NZD
Retailer 9$875 NZD
Retailer 13$908 NZD
Retailer 8$1,018 NZD
Retailer 6$1,066 NZD
Retailer 5$1,368 NZD
Retailer 12$1,393 NZD
Retailer 11$1,744 NZD
Retailer 4$1,830 NZD
Retailer 3$1,830 NZD
Retailer 1$2,167 NZD
Retailer 2$2,378 NZD

25 data points across 14 retailers

15 retailers$507 NZD to $4,141 NZD

A
Cheapest Retailer
-
$507 NZD
$285 USD
A
Retailer 2
-
$572 NZD
£253 GBP
View
A
Retailer 3
-
$583 NZD
$328 USD
View
Final sale: no returns
A
Retailer 4
-
$875 NZD
€469 EUR
View
A
Retailer 5
-
$908 NZD
$511 USD
View
A
Retailer 6
-
$1,018 NZD
£451 GBP
View
Retailer 7
-
$1,066 NZD
$600 USD
View
Price last confirmed 7 days ago
Retailer 8
-
$1,368 NZD
A$1,184 AUD
View
Price last confirmed 9 days ago
B+
Retailer 9
-
$1,393 NZD
$784 USD
View
B
Retailer 10
-
$1,744 NZD
$981 USD
View
B+
Retailer 11
-
$1,830 NZD
A$1,584 AUD
View
B+
Retailer 12
-
$1,830 NZD
$1,030 USD
View
B
Retailer 13
-
$2,167 NZD
£960 GBP
View
B
Retailer 14
-
$2,378 NZD
$1,338 USD
View
Most Expensive
B
Brilliant Earth
22340637A · Oct 31
$4,141 NZD
$2,330 USD
View
14 more retailers have this diamond
Prices start from $507 NZDSave up to $3,635 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
$507 NZD