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Heart|Natural|GIA

1.20ct H SI1 Heart Natural Diamond

EX • H/SI1 • GIA 11239679

Certificate GIA 11239679

Diamond specifications and retailer prices

From $6,082 AUD
As of November 4, 2026
Save $3,308 AUD (35%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $12,873 AUD at NZ Jewellers · As of November 5, 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 H 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 11239679. Listed at 14 retailers as of November 4, 2026, with a 54% 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishGood
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 11239679
Dimensions6.62 × 7.63 × 4.38 mm
L/W Ratio1.15
Girdle conditionFaceted
Culet sizeVery Small
Top View
6.62 mm7.63 mm1.20 ctH / SI1
OriginNatural
CutExcellent
PolishGood
SymmetryGood
FluorescenceNone
CertificateGIA 11239679
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: Very SmallDepth 57.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $12,873 AUD|Low: $5,363 AUD|High: $12,873 AUD|Avg: $8,326 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
November 7, 2026
Retailer 8$6,436 AUD
Retailer 12$6,578 AUD
Retailer 10$6,973 AUD
Retailer 11$6,973 AUD
Retailer 13$6,973 AUD
Retailer 2$7,606 AUD
Retailer 9$7,759 AUD
Retailer 4$7,965 AUD
Retailer 3$8,045 AUD
Retailer 5$8,494 AUD
Retailer 6$9,390 AUD
Retailer 7$12,227 AUD
NZ Jewellers$12,873 AUD

46 data points across 13 retailers

14 retailers$6,082 AUD to $9,390 AUD

B
Cheapest Retailer
-
$6,082 AUD
B
Retailer 2
-
$6,436 AUD
View
Final sale: no returns
B
Retailer 3
-
$6,578 AUD
View
B
Retailer 4
-
$6,973 AUD
View
B
Retailer 5
-
$6,973 AUD
View
Retailer 6
-
$6,973 AUD
View
Price last confirmed 9 days ago
B
Retailer 7
-
$7,606 AUD
View
Retailer 8
-
$7,759 AUD
View
Price last confirmed 29 days ago
B
Retailer 9
-
$7,965 AUD
View
B
Retailer 10
-
$8,045 AUD
View
Retailer 11
-
$8,494 AUD
View
Price last confirmed 15 days ago
B
Retailer 12
-
$9,390 AUD
View
Retailer 13
-
$12,227 AUD
View
Price under review
Most Expensive
NZ Jewellers
c10bbc6e-0c46-450a-9884-6dd09bc51576 · Nov 5
$12,873 AUD
$8,845 USD
View
Price under review
13 more retailers have this diamond
Prices start from $6,082 AUDSave up to $3,308 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
$6,082 AUD