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Heart|Natural|GIA

1.20ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 6541388165

Certificate GIA 6541388165

Diamond specifications and retailer prices

From $3,540 AUD
As of November 6, 2026
Save $4,178 AUD (54%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $8,872 AUD at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.2ct natural heart diamond

This 1.2ct 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 6541388165. Listed at 19 retailers as of November 6, 2026, with a 118% 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6541388165
Dimensions6.79 × 7.30 × 4.12 mm
L/W Ratio1.08
Top View
6.79 mm7.30 mm1.20 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6541388165
Side View
Table 63.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 56.5%

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 6
Current: $8,872 AUD|Low: $3,540 AUD|High: $8,872 AUD|Avg: $5,456 AUD
Queensmith
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
November 7, 2026
Retailer 5$3,540 AUD
Retailer 10$3,675 AUD
Retailer 15$4,141 AUD
Retailer 3$4,206 AUD
Retailer 7$4,282 AUD
Retailer 9$4,359 AUD
Retailer 11$4,500 AUD
Retailer 8$4,800 AUD
Retailer 6$4,848 AUD
Retailer 13$4,912 AUD
Retailer 4$4,992 AUD
Retailer 12$5,400 AUD
Retailer 14$5,663 AUD
Retailer 2$7,718 AUD
Queensmith$8,872 AUD

23 data points across 15 retailers

19 retailers$3,540 AUD to $7,718 AUD

B+
Cheapest Retailer
-
$3,540 AUD
A
Retailer 2
-
$3,675 AUD
View
B+
Retailer 3
-
$4,141 AUD
View
B+
Retailer 4
-
$4,206 AUD
View
B+
Retailer 5
-
$4,264 AUD
View
B+
Retailer 6
-
$4,282 AUD
View
Final sale: no returns
B+
Retailer 7
-
$4,359 AUD
View
B+
Retailer 8
-
$4,359 AUD
View
B+
Retailer 9
-
$4,500 AUD
View
B+
Retailer 10
-
$4,775 AUD
View
B+
Retailer 11
-
$4,800 AUD
View
B+
Retailer 12
-
$4,848 AUD
View
B+
Retailer 13
-
$4,912 AUD
View
B+
Retailer 14
-
$4,992 AUD
View
Retailer 15
-
$5,005 AUD
View
Price last confirmed 35 days ago
B+
Retailer 16
-
$5,400 AUD
View
B
Retailer 17
-
$5,663 AUD
View
B
Retailer 18
-
$7,718 AUD
View
Most Expensive
Queensmith
6541388165 · Oct 28
$8,872 AUD
£4,800 GBP
View
Price last confirmed 9 days ago
18 more retailers have this diamond
Prices start from $3,540 AUDSave up to $4,178 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
1.20ct Heart
$3,540 AUD