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1.23ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG529269207

Shape and cutting style on the report: Round brilliant

Certificate IGI LG529269207

Diamond specifications and retailer prices

From $315 NZD
As of November 5, 2026
Save $1,506 NZD (83%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,821 NZD at MOH London · As of November 2, 2026
View at MOH London

About this 1.23ct lab-grown round diamond

This 1.23ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG529269207 or 529269207. Listed at 11 retailers as of November 2, 2026, with prices from $315 to $1,821, a $1,506 spread on the same certified stone. MOH London lists it at $1,821. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.23
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG529269207
Dimensions6.84 × 6.80 × 4.24 mm
L/W Ratio1.01
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
6.84 mm6.80 mm1.23 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG529269207
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 62.2%

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: Nov 5
Current: $1,821 NZD|Low: $302 NZD|High: $2,446 NZD|Avg: $1,076 NZD|-1.1%
MOH London
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
November 6, 2026
Retailer 11$315 NZD
Retailer 15$352 NZD
Retailer 16$365 NZD
Retailer 17$614 NZD
Retailer 2$644 NZD
Retailer 13$690 NZD
Retailer 7$857 NZD
Retailer 5$971 NZD
Retailer 8$996 NZD
Retailer 6$1,041 NZD
Retailer 14$1,252 NZD
Retailer 9$1,261 NZD
Retailer 10$1,324 NZD
Retailer 12$1,708 NZD
Retailer 3$1,788 NZD
MOH London$1,821 NZD
Retailer 4$2,446 NZD

21 data points across 17 retailers

11 retailers$315 NZD to $1,821 NZD

A
Cheapest Retailer
-
$315 NZD
A
Retailer 2
-
$352 NZD
View
Final sale: no returns
A
Retailer 3
-
$365 NZD
View
A
Retailer 4
-
$614 NZD
View
A
Retailer 5
-
$644 NZD
View
A
Retailer 6
-
$690 NZD
View
B
Retailer 7
-
$1,252 NZD
View
B
Retailer 8
-
$1,324 NZD
View
B
Retailer 9
-
$1,708 NZD
View
B
Retailer 10
-
$1,788 NZD
View
Most Expensive
B
MOH London
LG529269207 · Nov 2
$1,821 NZD
£806 GBP
View
10 more retailers have this diamond
Prices start from $315 NZDSave up to $1,506 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
$315 NZD