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Heart|Natural|GIA

0.81ct D SI1 Heart Natural Diamond

GD • D/SI1 • GIA 1

Certificate GIA 1

Diamond specifications and retailer prices

From $3,249 AUD
$2,282 USD
As of October 31, 2026
Save $801 AUD (20%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $4,050 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. Listed at 3 retailers as of October 31, 2026, with prices from $3,249 to $4,050, a $801 spread on the same certified stone. Blue Nile lists it at $4,050. 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
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1
Dimensions6.56 × 6.80 × 3.31 mm
L/W Ratio1.04
Top View
6.56 mm6.80 mm0.81 ctD / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 1
Side View
Table 60.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 48.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $4,050 AUD|Low: $3,249 AUD|High: $4,050 AUD|Avg: $3,518 AUD
Blue Nile
Retailer 2
Retailer 3
September 26, 2026
Retailer 2$3,249 AUD
Retailer 3$3,521 AUD
Blue Nile$4,050 AUD

2 data points across 3 retailers

3 retailers$3,249 AUD to $4,050 AUD

B
Cheapest Retailer
-
$3,249 AUD
$2,282 USD
B
Retailer 2
-
$3,521 AUD
$2,474 USD
View
Most Expensive
C
Blue Nile
6009132 · Oct 31
$4,050 AUD
$2,845 USD
View
2 more retailers have this diamond
Prices start from $3,249 AUDSave up to $801 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.

B
0.81ct Heart
$3,249 AUD