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 $315 USD
£248 GBP
As of October 29, 2026
Save $2,015 USD (86%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,330 USD at Brilliant Earth · As of October 28, 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 13 retailers as of October 28, 2026, with prices from $315 to $2,330, a $2,015 spread on the same certified stone. Brilliant Earth lists it at $2,330. 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
Color
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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Price History

Last verified: Oct 29
Current: $782 USD|Low: $315 USD|High: $1,361 USD|Avg: $766 USD|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 9$315 USD
Retailer 10$318 USD
Retailer 4$524 USD
Retailer 6$561 USD
Retailer 2$600 USD
Retailer 11$770 USD
Retailer 1$782 USD
Retailer 12$962 USD
Retailer 7$1,030 USD
Retailer 5$1,030 USD
Retailer 8$1,194 USD
Retailer 3$1,361 USD

22 data points across 12 retailers

13 retailers$315 USD to $2,330 USD

A
Cheapest Retailer
-
$315 USD
£248 GBP
A
Retailer 2
-
$318 USD
View
Final sale: no returns
A
Retailer 3
-
$524 USD
View
A
Retailer 4
-
$561 USD
£441 GBP
View
B+
Retailer 5
-
$600 USD
View
B+
Retailer 6
-
$770 USD
A$1,184 AUD
View
B+
Retailer 7
-
$782 USD
View
B+
Retailer 8
-
$962 USD
View
B+
Retailer 9
-
$1,030 USD
A$1,584 AUD
View
B+
Retailer 10
-
$1,030 USD
View
B+
Retailer 11
-
$1,194 USD
£940 GBP
View
B
Retailer 12
-
$1,361 USD
View
Most Expensive
B
Brilliant Earth
22340637A · Oct 28
$2,330 USD
View
12 more retailers have this diamond
Prices start from $315 USDSave up to $2,015 USD

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
$315 USD