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Round|Natural|GIA

1.23ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 6365160641

Certificate GIA 6365160641

Diamond specifications and retailer prices

From $2,084 AUD
As of November 1, 2026
Save $1,737 AUD (45%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,851 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.23ct natural round diamond

This 1.23ct natural round sits in the classic one-carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6365160641. Listed at 13 retailers as of November 1, 2026, with a 83% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6365160641
Dimensions6.82 × 6.78 × 4.26 mm
L/W Ratio1.01
Top View
6.82 mm6.78 mm1.23 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6365160641
Side View
Table 58.0%CrownGirdlePavilionCulet: NoneDepth 62.6%

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 1
Current: $6,851 AUD|Low: $1,937 AUD|High: $6,851 AUD|Avg: $3,191 AUD|+5.1%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 2, 2026
Retailer 8$2,084 AUD
Retailer 14$2,537 AUD
Retailer 11$2,714 AUD
Retailer 7$2,776 AUD
Retailer 5$2,808 AUD
Retailer 13$2,808 AUD
Retailer 3$2,864 AUD
Retailer 4$2,938 AUD
Retailer 12$3,006 AUD
Retailer 10$3,241 AUD
Retailer 9$3,451 AUD
Retailer 2$3,821 AUD
Retailer 6$4,318 AUD
NZ Jewellers$6,851 AUD

26 data points across 14 retailers

13 retailers$2,084 AUD to $3,821 AUD

A
Cheapest Retailer
-
$2,084 AUD
B+
Retailer 2
-
$2,537 AUD
View
B+
Retailer 3
-
$2,714 AUD
View
B+
Retailer 4
-
$2,776 AUD
View
B+
Retailer 5
-
$2,808 AUD
View
Retailer 6
-
$2,808 AUD
View
Price last confirmed 8 days ago
B
Retailer 7
-
$2,864 AUD
View
Retailer 8
-
$2,938 AUD
View
Price last confirmed 8 days ago
B
Retailer 9
-
$3,006 AUD
View
B
Retailer 10
-
$3,241 AUD
View
B
Retailer 11
-
$3,451 AUD
View
B
Retailer 12
-
$3,821 AUD
View
Most Expensive
NZ Jewellers
922048f7-14f0-4f67-93c2-cd5dfe544109 · Oct 30
$6,851 AUD
$4,796 USD
View
Price last confirmed 7 days ago
12 more retailers have this diamond
Prices start from $2,084 AUDSave up to $1,737 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
$2,084 AUD