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Round|Lab Grown|IGI

1.23ct F FL Round Lab Grown Diamond

ID • F/FL • IGI LG818644662

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818644662

Diamond specifications and retailer prices

From $343 USD
As of November 4, 2026
Save $1,507 USD (81%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $1,850 USD at Brilliant Earth · As of November 3, 2026
View at Brilliant Earth

About this 1.23ct lab-grown round diamond

This 1.23ct 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 LG818644662 or 818644662. Listed at 19 retailers as of November 3, 2026, with prices from $343 to $1,850, a $1,507 spread on the same certified stone. Brilliant Earth lists it at $1,850. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
F
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818644662
Dimensions6.80 × 6.85 × 4.24 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
6.80 mm6.85 mm1.23 ctF / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818644662
Side View
Table 58.0%Crown 35.6°Girdle: MediumPavilion 40.8°Culet: NoneDepth 62.1%

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 4
Current: $1,850 USD|Low: $343 USD|High: $2,430 USD|Avg: $904 USD|-23.9%
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
November 4, 2026
Retailer 4$343 USD
Retailer 3$380 USD
Retailer 13$510 USD
Retailer 12$535 USD
Retailer 7$612 USD
Retailer 8$612 USD
Retailer 10$655 USD
Retailer 6$667 USD
Retailer 9$990 USD
Retailer 5$1,221 USD
Retailer 2$1,365 USD
Retailer 11$1,522 USD
Brilliant Earth$1,850 USD

42 data points across 13 retailers

19 retailers$343 USD to $1,850 USD

A
Cheapest Retailer
-
$343 USD
Final sale: no returns
A
Retailer 2
-
$356 USD
View
Retailer 3
-
$375 USD
View
Price last confirmed 64 days ago
Retailer 4
-
$380 USD
View
Price last confirmed 10 days ago
A
Retailer 5
-
$422 USD
View
B+
Retailer 6
-
$510 USD
View
A
Retailer 7
-
$535 USD
View
B+
Retailer 8
-
$612 USD
View
B+
Retailer 9
-
$612 USD
View
B+
Retailer 10
-
$655 USD
View
B+
Retailer 11
-
$667 USD
View
B+
Retailer 12
-
$680 USD
View
B
Retailer 13
-
$990 USD
View
B
Retailer 14
-
$1,221 USD
View
B
Retailer 15
-
$1,268 USD
View
B
Retailer 16
-
$1,362 USD
View
B
Retailer 17
-
$1,365 USD
View
B
Retailer 18
-
$1,522 USD
View
Most Expensive
B
Brilliant Earth
21370465A · Nov 3
$1,850 USD
View
18 more retailers have this diamond
Prices start from $343 USDSave up to $1,507 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
1.23ct Round
$343 USD