Radiant|Lab Grown|IGI

1.21ct E FL Radiant Lab Grown Diamond

ID • E/FL • IGI LG816616105

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

Certificate IGI LG816616105

Diamond specifications and retailer prices

From $302 USD
As of October 30, 2026
Save $2,248 USD (88%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $2,550 USD at Brilliant Earth · As of October 29, 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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816616105 or 816616105. Listed at 20 retailers as of October 29, 2026, with prices from $302 to $2,550, a $2,248 spread on the same certified stone. Brilliant Earth lists it at $2,550. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
E
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.1°
Pavilion angle34.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816616105
Dimensions7.68 × 5.29 × 3.48 mm
L/W Ratio1.45
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
7.68 mm5.29 mm1.21 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816616105
Side View
Table 61.0%Crown 40.1°Girdle: MediumPavilion 34.5°Culet: NoneDepth 65.8%

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: Oct 30
Current: $2,550 USD|Low: $288 USD|High: $2,640 USD|Avg: $1,073 USD|-3.4%
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
Retailer 17
October 30, 2026
Retailer 13$302 USD
Retailer 2$340 USD
Retailer 8$438 USD
Retailer 3$480 USD
Retailer 15$535 USD
Retailer 12$551 USD
Retailer 5$599 USD
Retailer 10$613 USD
Retailer 17$789 USD
Retailer 14$985 USD
Retailer 16$1,082 USD
Retailer 7$1,180 USD
Retailer 11$1,293 USD
Retailer 6$1,313 USD
Retailer 9$1,707 USD
Retailer 4$2,300 USD
Brilliant Earth$2,550 USD

29 data points across 17 retailers

20 retailers$302 USD to $2,550 USD

A
Cheapest Retailer
-
$302 USD
Final sale: no returns
Retailer 2
-
$339 USD
View
Price last confirmed 28 days ago
A
Retailer 3
-
$340 USD
£268 GBP
View
Retailer 4
-
$410 USD
View
Price last confirmed 32 days ago
Retailer 5
-
$438 USD
View
Price last confirmed 27 days ago
A
Retailer 6
-
$480 USD
View
A
Retailer 7
-
$535 USD
View
A
Retailer 8
-
$551 USD
ZAR 8,903 ZAR
View
A
Retailer 9
-
$599 USD
€570 EUR
View
A
Retailer 10
-
$613 USD
£482 GBP
View
B+
Retailer 11
-
$789 USD
View
B+
Retailer 12
-
$985 USD
View
B+
Retailer 13
-
$1,082 USD
View
B+
Retailer 14
-
$1,180 USD
SGD 1,595 SGD
View
B
Retailer 15
-
$1,293 USD
£1,018 GBP
View
B
Retailer 16
-
$1,313 USD
View
Retailer 17
-
$1,408 USD
View
Price last confirmed 29 days ago
Retailer 18
-
$1,707 USD
£1,344 GBP
View
Price last confirmed 25 days ago
Retailer 19
-
$2,300 USD
View
Price last confirmed 9 days ago
Most Expensive
B
Brilliant Earth
21421473A · Oct 29
$2,550 USD
View
19 more retailers have this diamond
Prices start from $302 USDSave up to $2,248 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
$302 USD