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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 $406 AUD
$285 USD
As of November 1, 2026
Save $2,911 AUD (88%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $3,317 AUD 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 $406 to $3,317, a $2,911 spread on the same certified stone. Brilliant Earth lists it at $3,317. 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: $1,736 AUD|Low: $406 AUD|High: $1,938 AUD|Avg: $1,087 AUD|-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$406 AUD
Retailer 7$458 AUD
Retailer 14$467 AUD
Retailer 9$701 AUD
Retailer 13$727 AUD
Retailer 8$815 AUD
Retailer 6$854 AUD
Retailer 5$1,096 AUD
Retailer 12$1,116 AUD
Retailer 11$1,397 AUD
Retailer 4$1,466 AUD
Retailer 3$1,466 AUD
Retailer 1$1,736 AUD
Retailer 2$1,905 AUD

25 data points across 14 retailers

15 retailers$406 AUD to $3,317 AUD

A
Cheapest Retailer
-
$406 AUD
$285 USD
A
Retailer 2
-
$458 AUD
£253 GBP
View
A
Retailer 3
-
$467 AUD
$328 USD
View
Final sale: no returns
A
Retailer 4
-
$701 AUD
€469 EUR
View
A
Retailer 5
-
$727 AUD
$511 USD
View
A
Retailer 6
-
$815 AUD
£451 GBP
View
Retailer 7
-
$854 AUD
$600 USD
View
Price last confirmed 5 days ago
Retailer 8
-
$1,096 AUD
View
Price last confirmed 7 days ago
B+
Retailer 9
-
$1,116 AUD
$784 USD
View
B
Retailer 10
-
$1,397 AUD
$981 USD
View
B+
Retailer 11
-
$1,466 AUD
View
B+
Retailer 12
-
$1,466 AUD
$1,030 USD
View
B
Retailer 13
-
$1,736 AUD
£960 GBP
View
B
Retailer 14
-
$1,905 AUD
$1,338 USD
View
Most Expensive
B
Brilliant Earth
22340637A · Oct 31
$3,317 AUD
$2,330 USD
View
14 more retailers have this diamond
Prices start from $406 AUDSave up to $2,911 AUD

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
$406 AUD