Heart|Natural|GIA

1.20ct F SI1 Heart Natural Diamond

ID • F/SI1 • GIA 25

Certificate GIA 25

Diamond specifications and retailer prices

From $4,820 AUD
As of November 6, 2026
Save $1,845 AUD (28%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: $11,109 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.2ct natural heart diamond

This 1.2ct natural heart sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 29 retailers as of November 5, 2026, with a 38% 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

1.20
Carat
F
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 25
Dimensions6.41 × 7.56 × 4.14 mm
L/W Ratio1.18
Top View
6.41 mm7.56 mm1.20 ctF / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 25
Side View
Table 62.0%CrownGirdle: MED-ETKPavilionCulet: NoneDepth 54.8%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: $11,109 AUD|Low: $4,820 AUD|High: $11,109 AUD|Avg: $6,379 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 7$4,820 AUD
Retailer 8$4,903 AUD
Retailer 4$5,776 AUD
Retailer 5$5,776 AUD
Retailer 6$5,776 AUD
Retailer 2$6,185 AUD
Retailer 3$6,666 AUD
NZ Jewellers$11,109 AUD

24 data points across 8 retailers

29 retailers$4,820 AUD to $6,666 AUD

B+
Cheapest Retailer
-
$4,820 AUD
B+
Retailer 2
-
$4,903 AUD
View
Retailer 3
-
$5,776 AUD
View
Price last confirmed 9 days ago
B
Retailer 4
-
$5,776 AUD
View
Retailer 5
-
$5,776 AUD
View
Price last confirmed 14 days ago
Retailer 6
-
$5,776 AUD
View
Price last confirmed 9 days ago
Retailer 7
-
$5,776 AUD
View
Price last confirmed 22 days ago
Retailer 8
-
$5,776 AUD
View
Price last confirmed 12 days ago
Retailer 9
-
$5,776 AUD
View
Price last confirmed 9 days ago
Retailer 10
-
$5,776 AUD
View
Price last confirmed 43 days ago
Retailer 11
-
$5,776 AUD
View
Price last confirmed 16 days ago
B
Retailer 12
-
$5,776 AUD
View
Retailer 13
-
$5,776 AUD
View
Price last confirmed 31 days ago
B
Retailer 14
-
$6,185 AUD
View
Retailer 15
-
$6,666 AUD
View
Price last confirmed 15 days ago
B
Retailer 16
-
$6,666 AUD
View
Retailer 17
-
$6,666 AUD
View
Price last confirmed 11 days ago
Retailer 18
-
$6,666 AUD
View
Price last confirmed 57 days ago
Retailer 19
-
$6,666 AUD
View
Price last confirmed 44 days ago
Retailer 20
-
$6,666 AUD
View
Price last confirmed 31 days ago
B
Retailer 21
-
$6,666 AUD
View
Retailer 22
-
$6,666 AUD
View
Price last confirmed 22 days ago
Retailer 23
-
$6,666 AUD
View
Price last confirmed 24 days ago
Retailer 24
-
$11,109 AUD
View
Price last confirmed 32 days ago
Retailer 25
-
$11,109 AUD
View
Price last confirmed 43 days ago
Retailer 26
-
$11,109 AUD
View
Price last confirmed 14 days ago
Retailer 27
-
$11,109 AUD
View
Price last confirmed 11 days ago
Retailer 28
-
$11,109 AUD
View
Price last confirmed 24 days ago
Most Expensive
NZ Jewellers
7a147ca9-5ff2-4c41-bc9c-94cc60f8a822 · Oct 30
$11,109 AUD
$7,633 USD
View
Price last confirmed 7 days ago
28 more retailers have this diamond
Prices start from $4,820 AUDSave up to $1,845 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+
1.20ct Heart
$4,820 AUD