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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 $4,023 SGD
As of November 6, 2026
Save $5,519 SGD (58%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $9,542 SGD 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 8 retailers as of November 5, 2026, with prices from $4,023 to $9,542, a $5,519 spread on the same certified stone. Diamond Quarter lists it at $9,542. 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $4,133 SGD|Low: $3,178 SGD|High: $7,593 SGD|Avg: $5,527 SGD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 7, 2026
Retailer 5$4,023 SGD
Retailer 1$4,133 SGD
Retailer 6$4,151 SGD
Retailer 4$4,828 SGD
Retailer 2$5,516 SGD
Retailer 3$7,249 SGD
Retailer 7$7,593 SGD

23 data points across 7 retailers

8 retailers$4,023 SGD to $9,542 SGD

A
Cheapest Retailer
-
$4,023 SGD
Final sale: no returns
A
Retailer 2
-
$4,133 SGD
View
A
Retailer 3
-
$4,151 SGD
View
B+
Retailer 4
-
$4,828 SGD
View
B+
Retailer 5
-
$5,516 SGD
View
B
Retailer 6
-
$7,249 SGD
View
B
Retailer 7
-
$7,593 SGD
View
Most Expensive
B
Diamond Quarter
1.23SI1G1507B434N · Nov 5
$9,542 SGD
£5,863 GBP
View
7 more retailers have this diamond
Prices start from $4,023 SGDSave up to $5,519 SGD

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
$4,023 SGD