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Round|Lab Grown|IGI

1.21ct F FL Round Lab Grown Diamond

ID • F/FL • IGI LG788625368

Shape and cutting style on the report: Round brilliant

Certificate IGI LG788625368

Diamond specifications and retailer prices

From $284 USD
As of November 1, 2026
Save $1,386 USD (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,670 USD at Brilliant Earth · As of November 2, 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 F colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG788625368 or 788625368. Listed at 18 retailers as of November 1, 2026, with prices from $284 to $1,670, a $1,386 spread on the same certified stone. Brilliant Earth lists it at $1,670. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
F
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG788625368
Dimensions6.92 × 6.86 × 4.22 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
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
6.92 mm6.86 mm1.21 ctF / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG788625368
Side View
Table 57.0%Crown 33.6°Girdle: MediumPavilion 41.1°Culet: NoneDepth 61.2%

Caratlytics Score

How it works →
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: $1,670 USD|Low: $284 USD|High: $2,390 USD|Avg: $805 USD|-30.1%
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
November 2, 2026
Retailer 14$284 USD
Retailer 4$295 USD
Retailer 5$316 USD
Retailer 13$475 USD
Retailer 10$524 USD
Retailer 6$528 USD
Retailer 12$545 USD
Retailer 7$567 USD
Retailer 11$600 USD
Retailer 8$643 USD
Retailer 3$970 USD
Retailer 17$1,018 USD
Retailer 9$1,066 USD
Retailer 16$1,107 USD
Retailer 2$1,247 USD
Retailer 15$1,510 USD
Brilliant Earth$1,670 USD

37 data points across 17 retailers

18 retailers$284 USD to $1,670 USD

A
Cheapest Retailer
-
$284 USD
Final sale: no returns
A
Retailer 2
-
$295 USD
View
Retailer 3
-
$316 USD
View
Price last confirmed 8 days ago
Retailer 4
-
$320 USD
View
Price last confirmed 63 days ago
A
Retailer 5
-
$475 USD
View
A
Retailer 6
-
$524 USD
€499 EUR
View
A
Retailer 7
-
$528 USD
View
A
Retailer 8
-
$545 USD
ZAR 8,804 ZAR
View
B+
Retailer 9
-
$567 USD
View
B+
Retailer 10
-
$600 USD
£473 GBP
View
B+
Retailer 11
-
$643 USD
View
B
Retailer 12
-
$970 USD
View
B+
Retailer 13
-
$1,018 USD
SGD 1,375 SGD
View
B
Retailer 14
-
$1,066 USD
View
B+
Retailer 15
-
$1,107 USD
View
B
Retailer 16
-
$1,247 USD
£982 GBP
View
B
Retailer 17
-
$1,510 USD
View
Most Expensive
B
Brilliant Earth
21419099A · Nov 2
$1,670 USD
View
17 more retailers have this diamond
Prices start from $284 USDSave up to $1,386 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
$284 USD