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Heart|Natural|GIA

1.23ct G SI1 Heart Natural Diamond

ID • G/SI1 • GIA 1232913295

Certificate GIA 1232913295

Diamond specifications and retailer prices

From $3,537 AUD
As of November 1, 2026
Save $4,331 AUD (55%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $8,162 AUD at NZ Jewellers · As of October 21, 2026
View at NZ Jewellers

About this 1.23ct natural heart diamond

This 1.23ct natural heart sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1232913295. Listed at 16 retailers as of November 1, 2026, with a 122% 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
G
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1232913295
Dimensions6.43 × 7.34 × 4.39 mm
L/W Ratio1.14
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Feather
Top View
6.43 mm7.34 mm1.23 ctG / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1232913295
Side View
Table 58.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 59.9%

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: $8,162 AUD|Low: $3,537 AUD|High: $8,162 AUD|Avg: $4,959 AUD
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
Retailer 15
Retailer 16
Retailer 17
November 7, 2026
Retailer 13$3,537 AUD
Retailer 9$3,639 AUD
Retailer 15$3,673 AUD
Retailer 16$4,244 AUD
Retailer 8$4,392 AUD
Retailer 14$4,407 AUD
Retailer 3$4,497 AUD
Retailer 10$4,589 AUD
Retailer 4$4,625 AUD
Retailer 6$4,876 AUD
Retailer 7$4,876 AUD
Retailer 17$4,897 AUD
Retailer 5$5,036 AUD
Retailer 11$5,506 AUD
Retailer 12$5,774 AUD
Retailer 2$7,868 AUD
NZ Jewellers$8,162 AUD

32 data points across 17 retailers

16 retailers$3,537 AUD to $7,868 AUD

A
Cheapest Retailer
-
$3,537 AUD
B+
Retailer 2
-
$3,673 AUD
View
Retailer 3
-
$4,244 AUD
View
Price last confirmed 16 days ago
Retailer 4
-
$4,407 AUD
View
Price last confirmed 16 days ago
B+
Retailer 5
-
$4,497 AUD
View
B+
Retailer 6
-
$4,589 AUD
View
B+
Retailer 7
-
$4,625 AUD
View
B+
Retailer 8
-
$4,876 AUD
View
B+
Retailer 9
-
$4,876 AUD
View
Retailer 10
-
$4,897 AUD
View
Price last confirmed 53 days ago
Retailer 11
-
$4,897 AUD
View
Price last confirmed 15 days ago
B+
Retailer 12
-
$5,036 AUD
View
B+
Retailer 13
-
$5,506 AUD
View
B
Retailer 14
-
$5,774 AUD
View
B
Retailer 15
-
$7,868 AUD
View
Most Expensive
NZ Jewellers
bdcd893b-9df2-49a8-b8b8-b0fae6f44362 · Oct 21
$8,162 AUD
$5,608 USD
View
Price last confirmed 16 days ago
15 more retailers have this diamond
Prices start from $3,537 AUDSave up to $4,331 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 Heart
$3,537 AUD