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Round|Natural|GIA

1.23ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 2557493818

Certificate GIA 2557493818

Diamond specifications and retailer prices

From $6,113 AUD
As of November 4, 2026
Save $4,796 AUD (44%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $10,909 AUD at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

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 2557493818. Listed at 12 retailers as of November 4, 2026, with prices from $6,113 to $10,909, a $4,796 spread on the same certified stone. Wholesale Diamonds Direct lists it at $10,909. 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 angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2557493818
Dimensions6.81 × 6.86 × 4.26 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Cloud, Twinning Wisp, Crystal, Feather
Top View
6.81 mm6.86 mm1.23 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557493818
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.3%

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 4
Current: $7,597 AUD|Low: $6,113 AUD|High: $10,909 AUD|Avg: $7,916 AUD|+1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Wholesale Diamonds Direct
November 6, 2026
Retailer 7$6,113 AUD
Retailer 5$6,608 AUD
Retailer 6$7,206 AUD
Retailer 4$7,418 AUD
Retailer 1$7,597 AUD
Retailer 3$7,973 AUD
Retailer 2$9,438 AUD
Wholesale Diamonds Direct$10,909 AUD

42 data points across 8 retailers

12 retailers$6,113 AUD to $10,909 AUD

B+
Cheapest Retailer
-
$6,113 AUD
B+
Retailer 2
-
$6,608 AUD
View
B+
Retailer 3
-
$7,206 AUD
View
B
Retailer 4
-
$7,386 AUD
View
B
Retailer 5
-
$7,418 AUD
View
B+
Retailer 6
-
$7,597 AUD
View
B
Retailer 7
-
$7,859 AUD
View
B
Retailer 8
-
$7,859 AUD
View
B
Retailer 9
-
$7,973 AUD
View
B
Retailer 10
-
$8,121 AUD
View
B
Retailer 11
-
$9,438 AUD
View
Most Expensive
B
Wholesale Diamonds Direct
252731742 · Nov 6
$10,909 AUD
$7,496 USD
View
11 more retailers have this diamond
Prices start from $6,113 AUDSave up to $4,796 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.

B+
1.23ct Round
$6,113 AUD