Heart|Natural|GIA

0.81ct D SI1 Heart Natural Diamond

ID • D/SI1 • GIA 6541804776

Certificate GIA 6541804776

Diamond specifications and retailer prices

From $1,117 USD
As of October 31, 2026
Save $1,191 USD (52%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $2,788 USD 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
Color
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: Oct 31
Current: $1,345 USD|Low: $812 USD|High: $2,308 USD|Avg: $1,420 USD|-3.1%
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 1, 2026
Retailer 12$1,117 USD
Retailer 3$1,134 USD
Retailer 5$1,143 USD
Retailer 9$1,160 USD
Retailer 8$1,287 USD
Retailer 6$1,335 USD
Retailer 1$1,345 USD
Retailer 7$1,381 USD
Retailer 2$1,464 USD
Retailer 4$1,495 USD
Retailer 10$1,692 USD
Retailer 11$1,791 USD
Retailer 13$2,308 USD

40 data points across 13 retailers

18 retailers$1,117 USD to $2,308 USD

A
Cheapest Retailer
-
$1,117 USD
Final sale: no returns
A
Retailer 2
-
$1,134 USD
View
Retailer 3
-
$1,143 USD
View
Price last confirmed 31 days ago
Retailer 4
-
$1,143 USD
View
Price last confirmed 16 days ago
A
Retailer 5
-
$1,160 USD
View
Retailer 6
-
$1,187 USD
View
Price last confirmed 31 days ago
A
Retailer 7
-
$1,287 USD
View
Retailer 8
-
$1,319 USD
View
Price last confirmed 55 days ago
Retailer 9
-
$1,319 USD
View
Price last confirmed 33 days ago
B+
Retailer 10
-
$1,335 USD
View
A
Retailer 11
-
$1,345 USD
View
B+
Retailer 12
-
$1,381 USD
£1,088 GBP
View
B+
Retailer 13
-
$1,464 USD
£1,153 GBP
View
Retailer 14
-
$1,495 USD
A$2,300 AUD
View
Price last confirmed 28 days ago
B+
Retailer 15
-
$1,692 USD
€1,611 EUR
View
B+
Retailer 16
-
$1,791 USD
ZAR 28,926 ZAR
View
B
Retailer 17
-
$2,308 USD
£1,817 GBP
View
Most Expensive
NZ Jewellers
04f28387-8860-40de-bca6-dbb8f13d8be6 · Sep 30
$2,788 USD
View
Price last confirmed 32 days ago
17 more retailers have this diamond
Prices start from $1,117 USDSave up to $1,191 USD

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
$1,117 USD