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Radiant|Natural|HRD

0.99ct K SI2 Radiant Natural Diamond

K/SI2 • HRD 12018509036

Certificate HRD 12018509036

Diamond specifications and retailer prices

From $3,426 AUD
As of November 6, 2026
Save $1,282 AUD (27%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $4,708 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 0.99ct natural radiant diamond

This 0.99ct natural radiant sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included) and certified by HRD 12018509036. Listed at 2 retailers as of November 4, 2026, with prices from $3,426 to $4,708, a $1,282 spread on the same certified stone. MOH London lists it at $4,708. 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

0.99
Carat
K
Colour
SI2
Clarity
-
Cut

Specifications

Cut
PolishGood
SymmetryGood
FluorescenceMedium
OriginNatural
Grading LabHRD
CertificateHRD 12018509036
Dimensions6.48 × 5.12 × 3.54 mm
L/W Ratio1.27
Girdle conditionPolished
Top View
6.48 mm5.12 mm0.99 ctK / SI2
OriginNatural
PolishGood
SymmetryGood
FluorescenceMedium
CertificateHRD 12018509036
Side View
Table 76.0%CrownGirdle: MediumPavilionCuletDepth 69.1%

Caratlytics Score

How it works →
C
Average
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Price History

Last verified: Nov 6
Current: $4,708 AUD|Low: $2,818 AUD|High: $4,778 AUD|Avg: $3,659 AUD|-0.3%
MOH London
Retailer 2
Retailer 3
November 6, 2026
Retailer 3$2,818 AUD
Retailer 2$3,426 AUD
MOH London$4,708 AUD

24 data points across 3 retailers

2 retailers$3,426 AUD to $4,708 AUD

C
Cheapest Retailer
-
$3,426 AUD
Most Expensive
C
MOH London
5615DF06E · Nov 4
$4,708 AUD
£2,547 GBP
View
1 more retailer has this diamond
Prices start from $3,426 AUDSave up to $1,282 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.

C
0.99ct Radiant
$3,426 AUD