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Round|Lab Grown|IGI

1.21ct E FL Round Lab Grown Diamond

ID • E/FL • IGI LG811638127

Shape and cutting style on the report: Round brilliant

Certificate IGI LG811638127

Diamond specifications and retailer prices

From $257 USD
As of October 29, 2026
Save $1,473 USD (85%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $1,730 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round 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 LG811638127 or 811638127. Listed at 20 retailers as of October 29, 2026, with prices from $257 to $1,730, a $1,473 spread on the same certified stone. Brilliant Earth lists it at $1,730. 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 angle34.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811638127
Dimensions6.87 × 6.84 × 4.20 mm
L/W Ratio1.00
Girdle conditionFaceted
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
6.87 mm6.84 mm1.21 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811638127
Side View
Table 57.0%Crown 34.1°Girdle: MediumPavilion 40.7°Culet: NoneDepth 61.3%

Caratlytics Score

How it works →
A+
Exceptional
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 29
Current: $1,730 USD|Low: $253 USD|High: $1,780 USD|Avg: $780 USD|-2.8%
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
Retailer 18
Retailer 19
October 29, 2026
Retailer 8$257 USD
Retailer 15$287 USD
Retailer 4$298 USD
Retailer 5$319 USD
Retailer 10$319 USD
Retailer 3$495 USD
Retailer 12$527 USD
Retailer 6$533 USD
Retailer 13$548 USD
Retailer 2$605 USD
Retailer 7$659 USD
Retailer 19$979 USD
Retailer 18$1,023 USD
Retailer 11$1,024 USD
Retailer 9$1,076 USD
Retailer 17$1,116 USD
Retailer 14$1,279 USD
Retailer 16$1,510 USD
Brilliant Earth$1,730 USD

38 data points across 19 retailers

20 retailers$257 USD to $1,730 USD

A+
Cheapest Retailer
-
$257 USD
A
Retailer 2
-
$287 USD
View
Final sale: no returns
A
Retailer 3
-
$298 USD
View
A
Retailer 4
-
$319 USD
View
A
Retailer 5
-
$319 USD
View
Retailer 6
-
$323 USD
View
Price last confirmed 58 days ago
A
Retailer 7
-
$495 USD
View
A
Retailer 8
-
$527 USD
€502 EUR
View
A
Retailer 9
-
$533 USD
View
A
Retailer 10
-
$548 USD
ZAR 8,845 ZAR
View
A
Retailer 11
-
$605 USD
£476 GBP
View
B+
Retailer 12
-
$659 USD
View
B+
Retailer 13
-
$979 USD
View
B+
Retailer 14
-
$1,023 USD
SGD 1,383 SGD
View
B+
Retailer 15
-
$1,024 USD
View
B+
Retailer 16
-
$1,076 USD
View
B+
Retailer 17
-
$1,116 USD
View
B+
Retailer 18
-
$1,279 USD
£1,007 GBP
View
Retailer 19
-
$1,510 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
21422382A · Oct 29
$1,730 USD
View
19 more retailers have this diamond
Prices start from $257 USDSave up to $1,473 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 Round
$257 USD