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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 €307 EUR
$343 USD
As of October 30, 2026
Save €1,349 EUR (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: €1,656 EUR at Brilliant Earth · As of October 30, 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 18 retailers as of October 30, 2026, with prices from €307 to €1,656, a €1,349 spread on the same certified stone. Brilliant Earth lists it at €1,656. 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: Oct 30
Current: €1,656 EUR|Low: €307 EUR|High: €2,238 EUR|Avg: €802 EUR|-26.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 3€307 EUR
Retailer 12€340 EUR
Retailer 11€456 EUR
Retailer 9€479 EUR
Retailer 2€547 EUR
Retailer 6€551 EUR
Retailer 8€585 EUR
Retailer 5€603 EUR
Retailer 10€881 EUR
Retailer 4€1,093 EUR
Retailer 7€1,371 EUR
Brilliant Earth€1,656 EUR

40 data points across 12 retailers

18 retailers€307 EUR to €1,656 EUR

A
Cheapest Retailer
-
€307 EUR
$343 USD
Final sale: no returns
A
Retailer 2
-
€319 EUR
$356 USD
View
Retailer 3
-
€336 EUR
$375 USD
View
Price last confirmed 61 days ago
A
Retailer 4
-
€340 EUR
$380 USD
View
A
Retailer 5
-
€378 EUR
HK$3,300 HKD
View
B+
Retailer 6
-
€456 EUR
$510 USD
View
A
Retailer 7
-
€479 EUR
$535 USD
View
B+
Retailer 8
-
€547 EUR
View
B+
Retailer 9
-
€551 EUR
£484 GBP
View
B+
Retailer 10
-
€585 EUR
ZAR 10,550 ZAR
View
B+
Retailer 11
-
€603 EUR
£531 GBP
View
B+
Retailer 12
-
€609 EUR
$680 USD
View
B
Retailer 13
-
€881 EUR
$984 USD
View
B
Retailer 14
-
€1,093 EUR
SGD 1,650 SGD
View
B
Retailer 15
-
€1,136 EUR
$1,269 USD
View
B
Retailer 16
-
€1,219 EUR
$1,362 USD
View
B
Retailer 17
-
€1,371 EUR
£1,206 GBP
View
Most Expensive
B
Brilliant Earth
21370465A · Oct 30
€1,656 EUR
$1,850 USD
View
17 more retailers have this diamond
Prices start from €307 EURSave up to €1,349 EUR

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
€307 EUR