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Round|Lab Grown|IGI

1.21ct F FL Round Lab Grown Diamond

ID • F/FL • IGI LG825659842

Shape and cutting style on the report: Round brilliant

Certificate IGI LG825659842

Diamond specifications and retailer prices

From $285 USD
As of November 1, 2026
Save $1,385 USD (83%) vs most expensive(unlock to see where)
17 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 LG825659842 or 825659842. Listed at 17 retailers as of November 1, 2026, with prices from $285 to $1,670, a $1,385 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 angle35.4°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825659842
Dimensions6.82 × 6.78 × 4.25 mm
L/W Ratio1.01
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
6.82 mm6.78 mm1.21 ctF / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825659842
Side View
Table 57.0%Crown 35.4°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.5%

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: $285 USD|High: $2,390 USD|Avg: $814 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 8$285 USD
Retailer 3$295 USD
Retailer 4$316 USD
Retailer 13$475 USD
Retailer 2$524 USD
Retailer 5$528 USD
Retailer 11$545 USD
Retailer 6$567 USD
Retailer 10$600 USD
Retailer 7$643 USD
Retailer 17$970 USD
Retailer 16$1,018 USD
Retailer 9$1,066 USD
Retailer 15$1,107 USD
Retailer 12$1,265 USD
Retailer 14$1,510 USD
Brilliant Earth$1,670 USD

39 data points across 17 retailers

17 retailers$285 USD to $1,670 USD

A
Cheapest Retailer
-
$285 USD
Final sale: no returns
A
Retailer 2
-
$295 USD
View
Retailer 3
-
$316 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
$475 USD
View
A
Retailer 5
-
$524 USD
€499 EUR
View
A
Retailer 6
-
$528 USD
View
A
Retailer 7
-
$545 USD
ZAR 8,804 ZAR
View
B+
Retailer 8
-
$567 USD
View
B+
Retailer 9
-
$600 USD
£473 GBP
View
B+
Retailer 10
-
$643 USD
View
B
Retailer 11
-
$970 USD
View
B+
Retailer 12
-
$1,018 USD
SGD 1,375 SGD
View
B
Retailer 13
-
$1,066 USD
View
B+
Retailer 14
-
$1,107 USD
View
B
Retailer 15
-
$1,265 USD
£996 GBP
View
B
Retailer 16
-
$1,510 USD
View
Most Expensive
B
Brilliant Earth
21418780A · Nov 2
$1,670 USD
View
16 more retailers have this diamond
Prices start from $285 USDSave up to $1,385 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
$285 USD