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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 HK$37,463 HKD
As of November 4, 2026
Save HK$30,777 HKD (45%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: HK$71,853 HKD 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: HK$68,240 HKD|Low: HK$28,089 HKD|High: HK$69,243 HKD|Avg: HK$43,883 HKD|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 4, 2026
Retailer 7HK$28,089 HKD
Retailer 3HK$37,463 HKD
Retailer 6HK$40,802 HKD
Retailer 2HK$42,965 HKD
Retailer 4HK$44,164 HKD
Retailer 5HK$44,877 HKD
Retailer 1HK$68,240 HKD

10 data points across 7 retailers

6 retailersHK$37,463 HKD to HK$68,240 HKD

B+
Cheapest Retailer
-
HK$37,463 HKD
Retailer 2
-
HK$42,965 HKD
View
Price last confirmed 39 days ago
B
Retailer 3
-
HK$44,164 HKD
View
Retailer 4
-
HK$49,572 HKD
View
Price last confirmed 38 days ago
B
Retailer 5
-
HK$68,240 HKD
View
Most Expensive
NZ Jewellers
b130c17c-76ed-4683-a333-94a6ef108a07 · Sep 30
HK$71,853 HKD
$9,168 USD
View
Price last confirmed 37 days ago
5 more retailers have this diamond
Prices start from HK$37,463 HKDSave up to HK$30,777 HKD

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
HK$37,463 HKD