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Heart|Natural|GIA

0.81ct D SI1 Heart Natural Diamond

EX • D/SI1 • GIA 80

Certificate GIA 80

Diamond specifications and retailer prices

From $3,332 AUD
$2,341 USD
As of October 31, 2026
Save $931 AUD (22%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $4,264 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 top-tier 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 $3,332 to $4,264, a $931 spread on the same certified stone. Blue Nile lists it at $4,264. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryGood
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 80
Dimensions5.95 × 6.34 × 3.61 mm
L/W Ratio1.07
Top View
5.95 mm6.34 mm0.81 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceMedium
CertificateGIA 80
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 56.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 31
Current: $4,264 AUD|Low: $3,332 AUD|High: $4,264 AUD|Avg: $3,551 AUD
Blue Nile
Retailer 2
Retailer 3
September 26, 2026
Retailer 3$3,332 AUD
Retailer 2$3,412 AUD
Blue Nile$4,264 AUD

2 data points across 3 retailers

3 retailers$3,332 AUD to $4,264 AUD

B
Cheapest Retailer
-
$3,332 AUD
$2,341 USD
B
Retailer 2
-
$3,412 AUD
$2,397 USD
View
Most Expensive
B
Blue Nile
14974603 · Oct 31
$4,264 AUD
$2,995 USD
View
2 more retailers have this diamond
Prices start from $3,332 AUDSave up to $931 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
$3,332 AUD