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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 £834 GBP
$1,117 USD
As of October 31, 2026
Save £889 GBP (52%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £2,081 GBP 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: Oct 31
Current: £1,004 GBP|Low: £606 GBP|High: £1,722 GBP|Avg: £1,060 GBP|-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£834 GBP
Retailer 3£846 GBP
Retailer 5£853 GBP
Retailer 9£866 GBP
Retailer 8£961 GBP
Retailer 6£996 GBP
Retailer 1£1,004 GBP
Retailer 7£1,031 GBP
Retailer 2£1,093 GBP
Retailer 4£1,116 GBP
Retailer 10£1,262 GBP
Retailer 11£1,336 GBP
Retailer 13£1,722 GBP

40 data points across 13 retailers

18 retailers£834 GBP to £1,722 GBP

A
Cheapest Retailer
-
£834 GBP
$1,117 USD
Final sale: no returns
A
Retailer 2
-
£846 GBP
$1,134 USD
View
Retailer 3
-
£853 GBP
$1,143 USD
View
Price last confirmed 31 days ago
Retailer 4
-
£853 GBP
$1,143 USD
View
Price last confirmed 16 days ago
A
Retailer 5
-
£866 GBP
$1,160 USD
View
Retailer 6
-
£886 GBP
$1,187 USD
View
Price last confirmed 31 days ago
A
Retailer 7
-
£961 GBP
$1,287 USD
View
Retailer 8
-
£984 GBP
$1,319 USD
View
Price last confirmed 56 days ago
Retailer 9
-
£984 GBP
$1,319 USD
View
Price last confirmed 33 days ago
B+
Retailer 10
-
£996 GBP
$1,335 USD
View
A
Retailer 11
-
£1,004 GBP
$1,345 USD
View
B+
Retailer 12
-
£1,031 GBP
View
B+
Retailer 13
-
£1,093 GBP
View
Retailer 14
-
£1,116 GBP
A$2,300 AUD
View
Price last confirmed 28 days ago
B+
Retailer 15
-
£1,262 GBP
€1,611 EUR
View
B+
Retailer 16
-
£1,336 GBP
ZAR 28,926 ZAR
View
B
Retailer 17
-
£1,722 GBP
View
Most Expensive
NZ Jewellers
04f28387-8860-40de-bca6-dbb8f13d8be6 · Sep 30
£2,081 GBP
$2,788 USD
View
Price last confirmed 32 days ago
17 more retailers have this diamond
Prices start from £834 GBPSave up to £889 GBP

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
£834 GBP