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Heart|Natural|HRD

1.23ct K SI2 Heart Natural Diamond

K/SI2 • HRD 170003116667

Certificate HRD 170003116667

Diamond specifications and retailer prices

From $4,235 AUD
As of November 6, 2026
Save $2,103 AUD (33%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $6,338 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 1.23ct natural heart diamond

This 1.23ct natural heart sits in the classic one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included) and certified by HRD 170003116667. Listed at 2 retailers as of November 4, 2026, with prices from $4,235 to $6,338, a $2,103 spread on the same certified stone. MOH London lists it at $6,338. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.23
Carat
K
Colour
SI2
Clarity
-
Cut

Specifications

Cut
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabHRD
CertificateHRD 170003116667
Dimensions6.13 × 6.70 × 3.76 mm
L/W Ratio1.09
Girdle conditionFaceted
Top View
6.13 mm6.70 mm1.23 ctK / SI2
OriginNatural
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateHRD 170003116667
Side View
Table 67.0%CrownGirdle: Extremely ThickPavilionCulet: NoneDepth 56.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: $6,338 AUD|Low: $3,695 AUD|High: $6,430 AUD|Avg: $4,768 AUD|-1.3%
MOH London
Retailer 2
Retailer 3
November 6, 2026
Retailer 3$3,695 AUD
Retailer 2$4,235 AUD
MOH London$6,338 AUD

22 data points across 3 retailers

2 retailers$4,235 AUD to $6,338 AUD

B
Cheapest Retailer
-
$4,235 AUD
Most Expensive
C
MOH London
110CC3515 · Nov 4
$6,338 AUD
£3,429 GBP
View
1 more retailer has this diamond
Prices start from $4,235 AUDSave up to $2,103 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
1.23ct Heart
$4,235 AUD