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1.23ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 5506576801

Certificate GIA 5506576801

Diamond specifications and retailer prices

From $4,779 SGD
As of November 7, 2026
Save $5,367 SGD (53%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $10,146 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 5506576801. Listed at 9 retailers as of November 5, 2026, with prices from $4,779 to $10,146, a $5,367 spread on the same certified stone. Diamond Quarter lists it at $10,146. 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
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 5506576801
Dimensions6.79 × 6.85 × 4.28 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.79 mm6.85 mm1.23 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5506576801
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 7
Current: $6,117 SGD|Low: $4,172 SGD|High: $9,950 SGD|Avg: $7,059 SGD|+2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 7, 2026
Retailer 5$5,271 SGD
Retailer 2$5,296 SGD
Retailer 6$5,343 SGD
Retailer 1$6,117 SGD
Retailer 3$7,127 SGD
Retailer 4$9,047 SGD
Retailer 7$9,950 SGD

21 data points across 7 retailers

9 retailers$4,779 SGD to $10,146 SGD

B+
Cheapest Retailer
-
$4,779 SGD
B+
Retailer 2
-
$5,271 SGD
View
Final sale: no returns
B+
Retailer 3
-
$5,296 SGD
View
B+
Retailer 4
-
$5,343 SGD
View
B+
Retailer 5
-
$6,117 SGD
View
B
Retailer 6
-
$7,127 SGD
View
B
Retailer 7
-
$9,047 SGD
View
B
Retailer 8
-
$9,950 SGD
View
Most Expensive
B
Diamond Quarter
1.23SI1G5501E3A1N · Nov 5
$10,146 SGD
£6,234 GBP
View
8 more retailers have this diamond
Prices start from $4,779 SGDSave up to $5,367 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.

B+
1.23ct Round
$4,779 SGD