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Heart|Natural|GIA

1.20ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 3415985694

Certificate GIA 3415985694

Diamond specifications and retailer prices

From $6,433 AUD
As of November 4, 2026
Save $3,499 AUD (35%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $12,929 AUD at MOH London · As of November 4, 2026
View at MOH London

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 3415985694. Listed at 19 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 3415985694
Dimensions5.88 × 5.67 × 4.12 mm
L/W Ratio1.04
Top View
5.88 mm5.67 mm1.20 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 3415985694
Side View
Table 58.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 72.7%

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: $12,929 AUD|Low: $6,484 AUD|High: $13,121 AUD|Avg: $8,736 AUD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 8$6,484 AUD
Retailer 11$6,631 AUD
Retailer 12$6,805 AUD
Retailer 4$6,926 AUD
Retailer 10$7,375 AUD
Retailer 2$7,840 AUD
Retailer 5$7,897 AUD
Retailer 3$8,152 AUD
Retailer 6$9,160 AUD
Retailer 7$9,932 AUD
Retailer 9$11,728 AUD
MOH London$12,929 AUD

36 data points across 12 retailers

19 retailers$6,433 AUD to $9,932 AUD

B
Cheapest Retailer
-
$6,433 AUD
B
Retailer 2
-
$6,484 AUD
View
B
Retailer 3
-
$6,631 AUD
View
B
Retailer 4
-
$6,805 AUD
View
Final sale: no returns
B
Retailer 5
-
$6,926 AUD
View
B
Retailer 6
-
$6,935 AUD
View
B
Retailer 7
-
$7,303 AUD
View
Retailer 8
-
$7,375 AUD
View
Price last confirmed 9 days ago
B
Retailer 9
-
$7,840 AUD
View
B
Retailer 10
-
$7,897 AUD
View
B
Retailer 11
-
$7,946 AUD
View
B
Retailer 12
-
$7,946 AUD
View
Retailer 13
-
$8,152 AUD
View
Price last confirmed 29 days ago
B
Retailer 14
-
$8,208 AUD
View
Retailer 15
-
$8,981 AUD
View
Price last confirmed 23 days ago
B
Retailer 16
-
$9,160 AUD
View
B
Retailer 17
-
$9,932 AUD
View
Retailer 18
-
$11,728 AUD
View
Price last confirmed 10 days ago
Most Expensive
MOH London
8BE0C30AB · Nov 4
$12,929 AUD
£6,995 GBP
View
Price under review
18 more retailers have this diamond
Prices start from $6,433 AUDSave up to $3,499 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
$6,433 AUD