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Heart|Natural|GIA

0.78ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 1549275139

Certificate GIA 1549275139

Diamond specifications and retailer prices

From $911 AUD
HK$5,000 HKD
As of October 30, 2026
Save $882 AUD (49%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $4,009 AUD at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 0.78ct natural heart diamond

This 0.78ct natural heart sits in the just-under-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 1549275139. Listed at 18 retailers as of October 30, 2026, with a 97% 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

0.78
Carat
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 1549275139
Dimensions5.51 × 6.50 × 3.84 mm
L/W Ratio1.18
Girdle conditionFaceted
Top View
5.51 mm6.50 mm0.78 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1549275139
Side View
Table 59.0%CrownGirdle: THN-THKPavilion 41.6°Culet: NoneDepth 59.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,790 AUD|Low: $911 AUD|High: $2,303 AUD|Avg: $1,453 AUD|-3.8%
Retailer 1
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
October 31, 2026
Retailer 15$911 AUD
Retailer 2$1,105 AUD
Retailer 5$1,182 AUD
Retailer 13$1,193 AUD
Retailer 11$1,198 AUD
Retailer 14$1,266 AUD
Retailer 6$1,269 AUD
Retailer 12$1,431 AUD
Retailer 10$1,440 AUD
Retailer 7$1,457 AUD
Retailer 9$1,463 AUD
Retailer 3$1,516 AUD
Retailer 1$1,790 AUD
Retailer 8$1,869 AUD
Retailer 16$1,872 AUD
Retailer 4$2,208 AUD

28 data points across 16 retailers

18 retailers$911 AUD to $1,793 AUD

A
Cheapest Retailer
-
$911 AUD
HK$5,000 HKD
A
Retailer 2
-
$1,105 AUD
$776 USD
View
Final sale: no returns
A
Retailer 3
-
$1,182 AUD
$830 USD
View
A
Retailer 4
-
$1,193 AUD
$838 USD
View
Retailer 5
-
$1,198 AUD
€801 EUR
View
Price last confirmed 3 days ago
A
Retailer 6
-
$1,266 AUD
$889 USD
View
Retailer 7
-
$1,269 AUD
SGD 1,205 SGD
View
Price last confirmed 10 days ago
A
Retailer 8
-
$1,431 AUD
$1,005 USD
View
A
Retailer 9
-
$1,440 AUD
£797 GBP
View
A
Retailer 10
-
$1,457 AUD
SGD 1,383 SGD
View
A
Retailer 11
-
$1,463 AUD
£809 GBP
View
A
Retailer 12
-
$1,516 AUD
$1,065 USD
View
B+
Retailer 13
-
$1,790 AUD
ZAR 20,310 ZAR
View
B+
Retailer 14
-
$1,793 AUD
View
Retailer 15
-
$1,869 AUD
View
Price last confirmed 29 days ago
Retailer 16
-
$1,872 AUD
$1,315 USD
View
Price last confirmed 9 days ago
Retailer 17
-
$2,208 AUD
£1,221 GBP
View
Price last confirmed 14 days ago
Most Expensive
NZ Jewellers
fe661871-26f7-47b4-9d4a-36a9581c5b83 · Sep 25
$4,009 AUD
$2,816 USD
View
Price last confirmed 37 days ago
17 more retailers have this diamond
Prices start from $911 AUDSave up to $882 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
0.78ct Heart
$911 AUD