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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 $410 NZD
As of November 4, 2026
Save $2,429 NZD (86%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $2,838 NZD at Brilliant Earth · As of November 4, 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 November 4, 2026, with prices from $410 to $2,838, a $2,429 spread on the same certified stone. Brilliant Earth lists it at $2,838. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $2,838 NZD|Low: $410 NZD|High: $2,838 NZD|Avg: $1,218 NZD
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
November 5, 2026
Retailer 6$410 NZD
Retailer 8$456 NZD
Retailer 3$642 NZD
Retailer 9$718 NZD
Retailer 15$770 NZD
Retailer 12$788 NZD
Retailer 2$811 NZD
Retailer 4$976 NZD
Retailer 11$1,116 NZD
Retailer 14$1,167 NZD
Retailer 5$1,171 NZD
Retailer 10$1,531 NZD
Retailer 13$1,825 NZD
Retailer 16$2,138 NZD
Retailer 7$2,159 NZD
Brilliant Earth$2,838 NZD

33 data points across 16 retailers

19 retailers$410 NZD to $2,838 NZD

Retailer 1
-
$367 NZD
Price last confirmed 26 days ago
A
Retailer 2
-
$410 NZD
View
Final sale: no returns
Retailer 3
-
$456 NZD
View
Price last confirmed 24 days ago
Retailer 4
-
$456 NZD
View
Price last confirmed 34 days ago
B+
Retailer 5
-
$642 NZD
View
A
Retailer 6
-
$718 NZD
View
A
Retailer 7
-
$770 NZD
View
A
Retailer 8
-
$788 NZD
View
A
Retailer 9
-
$811 NZD
View
A
Retailer 10
-
$976 NZD
View
A
Retailer 11
-
$1,116 NZD
View
A
Retailer 12
-
$1,167 NZD
View
B+
Retailer 13
-
$1,171 NZD
View
Retailer 14
-
$1,467 NZD
View
Price last confirmed 33 days ago
B+
Retailer 15
-
$1,531 NZD
View
B+
Retailer 16
-
$1,825 NZD
View
B
Retailer 17
-
$2,138 NZD
View
B
Retailer 18
-
$2,159 NZD
View
Most Expensive
B
Brilliant Earth
21580984A · Nov 4
$2,838 NZD
$1,600 USD
View
18 more retailers have this diamond
Prices start from $410 NZDSave up to $2,429 NZD

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
$410 NZD