Round|Lab Grown|IGI

1.23ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG817677827

Shape and cutting style on the report: Round brilliant

Certificate IGI LG817677827

Diamond specifications and retailer prices

From $186 USD
As of October 29, 2026
Save $1,414 USD (88%) vs most expensive(unlock to see where)
12 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 LG817677827 or 817677827. Listed at 12 retailers as of October 29, 2026, with prices from $186 to $1,600, a $1,414 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 angle33.1°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817677827
Dimensions6.92 × 6.90 × 4.20 mm
L/W Ratio1.00
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
6.92 mm6.90 mm1.23 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817677827
Side View
Table 59.0%Crown 33.1°Girdle: MediumPavilion 41°Culet: NoneDepth 60.7%

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 29
Current: $1,600 USD|Low: $186 USD|High: $1,650 USD|Avg: $703 USD|-3.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 11$186 USD
Retailer 8$216 USD
Retailer 9$322 USD
Retailer 2$400 USD
Retailer 6$563 USD
Retailer 10$596 USD
Retailer 7$742 USD
Retailer 3$795 USD
Retailer 4$1,085 USD
Retailer 5$1,195 USD
Brilliant Earth$1,600 USD

32 data points across 11 retailers

12 retailers$186 USD to $1,600 USD

A
Cheapest Retailer
-
$186 USD
A
Retailer 2
-
$216 USD
View
B+
Retailer 3
-
$322 USD
View
A
Retailer 4
-
$400 USD
€381 EUR
View
A
Retailer 5
-
$563 USD
A$866 AUD
View
A
Retailer 6
-
$596 USD
View
B+
Retailer 7
-
$742 USD
View
B+
Retailer 8
-
$795 USD
View
B+
Retailer 9
-
$1,085 USD
£854 GBP
View
B+
Retailer 10
-
$1,195 USD
View
Retailer 11
-
$1,600 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
21493851A · Oct 29
$1,600 USD
View
11 more retailers have this diamond
Prices start from $186 USDSave up to $1,414 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
$186 USD