Round|Lab Grown|IGI

1.23ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG780612543

Shape and cutting style on the report: Round brilliant

Certificate IGI LG780612543

Diamond specifications and retailer prices

From $231 USD
As of October 28, 2026
Save $1,369 USD (86%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $1,600 USD at Brilliant Earth · As of October 29, 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780612543 or 780612543. Listed at 19 retailers as of October 28, 2026, with prices from $231 to $1,600, a $1,369 spread on the same certified stone. Brilliant Earth lists it at $1,600. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780612543
Dimensions6.90 × 6.95 × 4.22 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
6.90 mm6.95 mm1.23 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780612543
Side View
Table 57.0%Crown 34.6°Girdle: MediumPavilion 40.5°Culet: NoneDepth 60.9%

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 28
Current: $1,600 USD|Low: $231 USD|High: $1,600 USD|Avg: $686 USD
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
October 29, 2026
Retailer 6$231 USD
Retailer 8$257 USD
Retailer 16$362 USD
Retailer 10$418 USD
Retailer 9$435 USD
Retailer 12$442 USD
Retailer 2$471 USD
Retailer 3$550 USD
Retailer 13$629 USD
Retailer 4$660 USD
Retailer 14$830 USD
Retailer 5$880 USD
Retailer 11$1,036 USD
Retailer 15$1,205 USD
Retailer 7$1,217 USD
Brilliant Earth$1,600 USD

26 data points across 16 retailers

19 retailers$231 USD to $1,600 USD

Retailer 1
-
$207 USD
Price last confirmed 19 days ago
A
Retailer 2
-
$231 USD
View
Final sale: no returns
Retailer 3
-
$257 USD
View
Price last confirmed 17 days ago
Retailer 4
-
$257 USD
View
Price last confirmed 27 days ago
B+
Retailer 5
-
$362 USD
View
A
Retailer 6
-
$418 USD
£329 GBP
View
A
Retailer 7
-
$435 USD
€414 EUR
View
A
Retailer 8
-
$442 USD
ZAR 7,137 ZAR
View
A
Retailer 9
-
$471 USD
£371 GBP
View
A
Retailer 10
-
$550 USD
View
A
Retailer 11
-
$629 USD
A$967 AUD
View
B+
Retailer 12
-
$660 USD
View
Retailer 13
-
$827 USD
View
Price last confirmed 26 days ago
B+
Retailer 14
-
$830 USD
View
B+
Retailer 15
-
$880 USD
View
B+
Retailer 16
-
$1,036 USD
£816 GBP
View
Retailer 17
-
$1,205 USD
View
Price last confirmed 11 days ago
B
Retailer 18
-
$1,217 USD
View
Most Expensive
B
Brilliant Earth
21580984A · Oct 29
$1,600 USD
View
18 more retailers have this diamond
Prices start from $231 USDSave up to $1,369 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
$231 USD