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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 $6,126 SGD
As of November 4, 2026
Save $5,033 SGD (45%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $11,750 SGD 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: $11,159 SGD|Low: $4,593 SGD|High: $11,323 SGD|Avg: $7,177 SGD|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 4, 2026
Retailer 7$4,593 SGD
Retailer 3$6,126 SGD
Retailer 6$6,672 SGD
Retailer 2$7,026 SGD
Retailer 4$7,222 SGD
Retailer 5$7,338 SGD
Retailer 1$11,159 SGD

9 data points across 7 retailers

6 retailers$6,126 SGD to $11,159 SGD

B+
Cheapest Retailer
-
$6,126 SGD
Retailer 2
-
$7,026 SGD
View
Price last confirmed 40 days ago
B
Retailer 3
-
$7,222 SGD
View
Retailer 4
-
$8,106 SGD
View
Price last confirmed 39 days ago
B
Retailer 5
-
$11,159 SGD
View
Most Expensive
NZ Jewellers
b130c17c-76ed-4683-a333-94a6ef108a07 · Sep 30
$11,750 SGD
$9,168 USD
View
Price last confirmed 37 days ago
5 more retailers have this diamond
Prices start from $6,126 SGDSave up to $5,033 SGD

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
$6,126 SGD