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Round|Natural|GIA

1.23ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 1519310807

Certificate GIA 1519310807

Diamond specifications and retailer prices

From $4,569 AUD
As of November 6, 2026
Save $6,268 AUD (58%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $10,836 AUD 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 $4,569 to $10,836, a $6,268 spread on the same certified stone. Diamond Quarter lists it at $10,836. 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: $8,254 AUD|Low: $3,609 AUD|High: $8,623 AUD|Avg: $6,288 AUD|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 4, 2026
Retailer 3$4,569 AUD
Retailer 4$4,714 AUD
Retailer 2$5,482 AUD
Retailer 1$8,254 AUD
Retailer 5$8,623 AUD

22 data points across 5 retailers

6 retailers$4,569 AUD to $10,836 AUD

A
Cheapest Retailer
-
$4,569 AUD
Final sale: no returns
A
Retailer 2
-
$4,714 AUD
View
B+
Retailer 3
-
$5,482 AUD
View
B
Retailer 4
-
$8,254 AUD
View
B
Retailer 5
-
$8,623 AUD
View
Most Expensive
B
Diamond Quarter
1.23SI1G1507B434N · Nov 5
$10,836 AUD
£5,863 GBP
View
5 more retailers have this diamond
Prices start from $4,569 AUDSave up to $6,268 AUD

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
$4,569 AUD