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Heart|Natural|GIA

0.81ct D SI1 Heart Natural Diamond

ID • D/SI1 • GIA 6541804776

Certificate GIA 6541804776

Diamond specifications and retailer prices

From $1,590 AUD
$1,117 USD
As of November 2, 2026
Save $1,695 AUD (52%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $3,969 AUD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 0.81ct natural heart diamond

This 0.81ct natural heart sits in the just-under-one-carat band, graded D 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 6541804776. Listed at 18 retailers as of October 29, 2026, with a 107% 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

0.81
Carat
D
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.79°
Pavilion angle42.33°
OriginNatural
Grading LabGIA
CertificateGIA 6541804776
Dimensions5.76 × 6.31 × 3.87 mm
L/W Ratio1.10
Top View
5.76 mm6.31 mm0.81 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6541804776
Side View
Table 57.0%Crown 36.79°Girdle: Slightly ThickPavilion 42.33°Culet: NoneDepth 61.3%

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: Nov 2
Current: $1,966 AUD|Low: $1,156 AUD|High: $3,285 AUD|Avg: $2,022 AUD|+10.5%
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
November 2, 2026
Retailer 12$1,590 AUD
Retailer 3$1,614 AUD
Retailer 5$1,627 AUD
Retailer 9$1,651 AUD
Retailer 8$1,832 AUD
Retailer 7$1,901 AUD
Retailer 6$1,915 AUD
Retailer 1$1,966 AUD
Retailer 2$2,084 AUD
Retailer 4$2,128 AUD
Retailer 10$2,408 AUD
Retailer 11$2,549 AUD
Retailer 13$3,285 AUD

41 data points across 13 retailers

18 retailers$1,590 AUD to $3,285 AUD

A
Cheapest Retailer
-
$1,590 AUD
$1,117 USD
Final sale: no returns
A
Retailer 2
-
$1,614 AUD
$1,134 USD
View
Retailer 3
-
$1,627 AUD
$1,143 USD
View
Price last confirmed 31 days ago
Retailer 4
-
$1,627 AUD
$1,143 USD
View
Price last confirmed 17 days ago
A
Retailer 5
-
$1,651 AUD
$1,160 USD
View
Retailer 6
-
$1,690 AUD
$1,187 USD
View
Price last confirmed 32 days ago
A
Retailer 7
-
$1,832 AUD
$1,287 USD
View
Retailer 8
-
$1,878 AUD
$1,319 USD
View
Price last confirmed 56 days ago
Retailer 9
-
$1,878 AUD
$1,319 USD
View
Price last confirmed 34 days ago
B+
Retailer 10
-
$1,901 AUD
$1,335 USD
View
A
Retailer 11
-
$1,915 AUD
$1,345 USD
View
B+
Retailer 12
-
$1,966 AUD
£1,088 GBP
View
B+
Retailer 13
-
$2,084 AUD
£1,153 GBP
View
Retailer 14
-
$2,128 AUD
View
Price last confirmed 29 days ago
B+
Retailer 15
-
$2,408 AUD
€1,611 EUR
View
B+
Retailer 16
-
$2,549 AUD
ZAR 28,926 ZAR
View
B
Retailer 17
-
$3,285 AUD
£1,817 GBP
View
Most Expensive
NZ Jewellers
04f28387-8860-40de-bca6-dbb8f13d8be6 · Sep 30
$3,969 AUD
$2,788 USD
View
Price last confirmed 32 days ago
17 more retailers have this diamond
Prices start from $1,590 AUDSave up to $1,695 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
0.81ct Heart
$1,590 AUD