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1.23ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 1519310807

Certificate GIA 1519310807

Diamond specifications and retailer prices

From $5,662 NZD
As of November 6, 2026
Save $7,769 NZD (58%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $13,431 NZD at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

About this 1.23ct natural round diamond

This 1.23ct natural round sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1519310807. Listed at 6 retailers as of November 5, 2026, with prices from $5,662 to $13,431, a $7,769 spread on the same certified stone. Diamond Quarter lists it at $13,431. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1519310807
Dimensions6.79 × 6.84 × 4.30 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Key to symbols
Crystal, Cloud, Needle
Top View
6.79 mm6.84 mm1.23 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1519310807
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.1%

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 6
Current: $10,230 NZD|Low: $4,474 NZD|High: $10,688 NZD|Avg: $7,794 NZD|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 4, 2026
Retailer 3$5,662 NZD
Retailer 4$5,843 NZD
Retailer 2$6,795 NZD
Retailer 1$10,230 NZD
Retailer 5$10,688 NZD

22 data points across 5 retailers

6 retailers$5,662 NZD to $13,431 NZD

A
Cheapest Retailer
-
$5,662 NZD
Final sale: no returns
A
Retailer 2
-
$5,843 NZD
View
B+
Retailer 3
-
$6,795 NZD
View
B
Retailer 4
-
$10,230 NZD
View
B
Retailer 5
-
$10,688 NZD
View
Most Expensive
B
Diamond Quarter
1.23SI1G1507B434N · Nov 5
$13,431 NZD
£5,863 GBP
View
5 more retailers have this diamond
Prices start from $5,662 NZDSave up to $7,769 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
$5,662 NZD