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Heart|Natural|GIA

0.81ct D SI1 Heart Natural Diamond

GD • D/SI1 • GIA 7551723254

Certificate GIA 7551723254

Diamond specifications and retailer prices

From $1,487 AUD
$1,042 USD
As of November 1, 2026
Save $261 AUD (15%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $1,748 AUD at Blue Nile · As of October 31, 2026
View at Blue Nile

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 standard cut grade stated by the retailer rather than the lab and certified by GIA 7551723254. Listed at 4 retailers as of October 31, 2026, with prices from $1,487 to $1,748, a $261 spread on the same certified stone. Blue Nile lists it at $1,748. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

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

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7551723254
Dimensions5.57 × 6.66 × 3.68 mm
L/W Ratio1.20
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather
Top View
5.57 mm6.66 mm0.81 ctD / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 7551723254
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 55.3%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: $1,748 AUD|Low: $1,487 AUD|High: $1,945 AUD|Avg: $1,648 AUD|-10.1%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
November 2, 2026
Retailer 3$1,487 AUD
Retailer 2$1,591 AUD
Retailer 4$1,609 AUD
Blue Nile$1,748 AUD

39 data points across 4 retailers

4 retailers$1,487 AUD to $1,748 AUD

A
Cheapest Retailer
-
$1,487 AUD
$1,042 USD
A
Retailer 2
-
$1,591 AUD
£878 GBP
View
A
Retailer 3
-
$1,609 AUD
SGD 1,524 SGD
View
Most Expensive
B+
Blue Nile
29693554 · Oct 31
$1,748 AUD
$1,225 USD
View
3 more retailers have this diamond
Prices start from $1,487 AUDSave up to $261 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
$1,487 AUD