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Heart|Natural|HRD

1.78ct D SI1 Heart Natural Diamond

EX • D/SI1 • HRD 220000147811

Shape and cutting style on the report: Heart

Certificate HRD 220000147811

Diamond specifications and retailer prices

From $10,472 AUD
$7,356 USD
As of November 1, 2026
Save $9,793 AUD (48%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $20,265 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.78ct natural heart diamond

This 1.78ct natural heart sits in the one-and-a-half to two 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 HRD 220000147811. Listed at 9 retailers as of October 30, 2026, with prices from $10,472 to $20,265, a $9,793 spread on the same certified stone. NZ Jewellers lists it at $20,265. 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

1.78
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryGood
FluorescenceFaint
OriginNatural
Grading LabHRD
CertificateHRD 220000147811
Dimensions7.86 × 8.48 × 4.59 mm
L/W Ratio1.08
Girdle conditionFaceted
Top View
7.86 mm8.48 mm1.78 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceFaint
CertificateHRD 220000147811
Side View
Table 56.0%CrownGirdle: MediumPavilionCulet: NoneDepth 54.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $20,265 AUD|Low: $10,472 AUD|High: $20,265 AUD|Avg: $12,858 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 9$10,472 AUD
Retailer 7$11,184 AUD
Retailer 2$11,519 AUD
Retailer 3$12,116 AUD
Retailer 6$12,303 AUD
Retailer 8$12,377 AUD
Retailer 4$12,496 AUD
Retailer 5$13,980 AUD
NZ Jewellers$20,265 AUD

38 data points across 9 retailers

9 retailers$10,472 AUD to $20,265 AUD

B+
Cheapest Retailer
-
$10,472 AUD
$7,356 USD
B+
Retailer 2
-
$11,519 AUD
£6,371 GBP
View
B+
Retailer 3
-
$12,116 AUD
$8,511 USD
View
Retailer 4
-
$12,303 AUD
$8,642 USD
View
Price last confirmed 16 days ago
B+
Retailer 5
-
$12,377 AUD
$8,694 USD
View
B+
Retailer 6
-
$12,496 AUD
€8,360 EUR
View
B
Retailer 7
-
$12,828 AUD
€8,582 EUR
View
B+
Retailer 8
-
$13,980 AUD
$9,820 USD
View
Most Expensive
B
NZ Jewellers
12f6090b-8780-4678-97a8-692ff8a0a5b5 · Oct 30
$20,265 AUD
$14,235 USD
View
8 more retailers have this diamond
Prices start from $10,472 AUDSave up to $9,793 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+
1.78ct Heart
$10,472 AUD