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Heart|Natural|HRD

1.64ct K SI2 Heart Natural Diamond

ID • K/SI2 • HRD 190000105819

Certificate HRD 190000105819

Diamond specifications and retailer prices

From $8,623 NZD
As of November 4, 2026
Save $7,084 NZD (45%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $16,538 NZD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.64ct natural heart diamond

This 1.64ct natural heart sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by HRD 190000105819. Listed at 6 retailers as of November 4, 2026, with a 82% 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

1.64
Carat
K
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabHRD
CertificateHRD 190000105819
Dimensions6.74 × 8.11 × 4.96 mm
L/W Ratio1.20
Girdle conditionFaceted
Top View
6.74 mm8.11 mm1.64 ctK / SI2
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateHRD 190000105819
Side View
Table 59.0%CrownGirdle: MediumPavilionCulet: NoneDepth 61.2%

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 4
Current: $15,707 NZD|Low: $6,465 NZD|High: $15,937 NZD|Avg: $10,100 NZD|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 4, 2026
Retailer 7$6,465 NZD
Retailer 3$8,623 NZD
Retailer 6$9,391 NZD
Retailer 2$9,889 NZD
Retailer 4$10,165 NZD
Retailer 5$10,329 NZD
Retailer 1$15,707 NZD

10 data points across 7 retailers

6 retailers$8,623 NZD to $15,707 NZD

B+
Cheapest Retailer
-
$8,623 NZD
Retailer 2
-
$9,889 NZD
View
Price last confirmed 39 days ago
B
Retailer 3
-
$10,165 NZD
View
Retailer 4
-
$11,410 NZD
View
Price last confirmed 38 days ago
B
Retailer 5
-
$15,707 NZD
View
Most Expensive
NZ Jewellers
b130c17c-76ed-4683-a333-94a6ef108a07 · Sep 30
$16,538 NZD
$9,168 USD
View
Price last confirmed 37 days ago
5 more retailers have this diamond
Prices start from $8,623 NZDSave up to $7,084 NZD

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+
1.64ct Heart
$8,623 NZD