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Round|Lab Grown|IGI

1.23ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG778645544

Shape and cutting style on the report: Round brilliant

Certificate IGI LG778645544

Diamond specifications and retailer prices

From $280 USD
As of October 30, 2026
Save $2,006 USD (88%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $2,380 USD at Brilliant Earth · As of October 21, 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 LG778645544 or 778645544. Listed at 23 retailers as of October 27, 2026, with a 716% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle33.2°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778645544
Dimensions6.97 × 6.99 × 4.20 mm
L/W Ratio1.00
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
6.97 mm6.99 mm1.23 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778645544
Side View
Table 58.0%Crown 33.2°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.1%

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: $2,380 USD|Low: $199 USD|High: $2,380 USD|Avg: $843 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
Retailer 17
Retailer 18
Retailer 19
Retailer 20
October 30, 2026
Retailer 15$280 USD
Retailer 6$307 USD
Retailer 20$346 USD
Retailer 5$420 USD
Retailer 18$420 USD
Retailer 13$510 USD
Retailer 16$534 USD
Retailer 4$563 USD
Retailer 2$591 USD
Retailer 8$675 USD
Retailer 17$757 USD
Retailer 19$787 USD
Retailer 11$1,006 USD
Retailer 9$1,052 USD
Retailer 3$1,089 USD
Retailer 14$1,253 USD
Retailer 7$1,270 USD
Retailer 10$1,356 USD
Retailer 12$2,286 USD
Brilliant Earth$2,380 USD

26 data points across 20 retailers

23 retailers$280 USD to $2,286 USD

Retailer 1
-
$251 USD
Price last confirmed 38 days ago
A
Retailer 2
-
$280 USD
View
Final sale: no returns
Retailer 3
-
$291 USD
View
Price last confirmed 38 days ago
Retailer 4
-
$307 USD
View
Price last confirmed 38 days ago
A
Retailer 5
-
$346 USD
HK$2,700 HKD
View
A
Retailer 6
-
$420 USD
View
A
Retailer 7
-
$420 USD
View
A
Retailer 8
-
$510 USD
€486 EUR
View
A
Retailer 9
-
$534 USD
ZAR 8,633 ZAR
View
A
Retailer 10
-
$563 USD
View
A
Retailer 11
-
$591 USD
£465 GBP
View
B+
Retailer 12
-
$675 USD
View
B+
Retailer 13
-
$757 USD
A$1,165 AUD
View
B+
Retailer 14
-
$787 USD
View
Retailer 15
-
$1,000 USD
View
Price last confirmed 39 days ago
B+
Retailer 16
-
$1,006 USD
SGD 1,359 SGD
View
B+
Retailer 17
-
$1,052 USD
View
B+
Retailer 18
-
$1,089 USD
View
B+
Retailer 19
-
$1,253 USD
£987 GBP
View
Retailer 20
-
$1,270 USD
View
Price last confirmed 51 days ago
B
Retailer 21
-
$1,356 USD
View
B
Retailer 22
-
$2,286 USD
£1,800 GBP
View
Most Expensive
Brilliant Earth
18359515A · Oct 21
$2,380 USD
View
Price last confirmed 9 days ago
22 more retailers have this diamond
Prices start from $280 USDSave up to $2,006 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
$280 USD