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3.18ct M SI1 Round Natural Diamond

EX • M/SI1 • HRD 240000067256

Certificate HRD 240000067256

Diamond specifications and retailer prices

From $13,565 AUD
As of November 5, 2026
Save $12,781 AUD (49%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $26,346 AUD at NZ Jewellers · As of November 2, 2026
View at NZ Jewellers

About this 3.18ct natural round diamond

This 3.18ct natural round sits in the three to five carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by HRD 240000067256. Listed at 8 retailers as of November 2, 2026, with prices from $13,565 to $26,346, a $12,781 spread on the same certified stone. NZ Jewellers lists it at $26,346. 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

3.18
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.6°
Pavilion angle41°
OriginNatural
Grading LabHRD
CertificateHRD 240000067256
Dimensions9.28 × 9.35 × 5.86 mm
L/W Ratio1.01
Top View
9.28 mm9.35 mm3.18 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateHRD 240000067256
Side View
Table 57.0%Crown 35.6°Girdle: MED-MEDPavilion 41°Culet: NoneDepth 62.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $26,346 AUD|Low: $13,565 AUD|High: $26,346 AUD|Avg: $18,537 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 2$13,565 AUD
Retailer 9$15,853 AUD
Retailer 4$16,188 AUD
Retailer 8$17,448 AUD
Retailer 5$18,612 AUD
Retailer 3$18,873 AUD
Retailer 6$18,902 AUD
Retailer 7$19,629 AUD
NZ Jewellers$26,346 AUD

44 data points across 9 retailers

8 retailers$13,565 AUD to $26,346 AUD

A
Cheapest Retailer
-
$13,565 AUD
B+
Retailer 2
-
$16,188 AUD
View
Retailer 3
-
$17,448 AUD
View
Price last confirmed 8 days ago
B+
Retailer 4
-
$18,612 AUD
View
A
Retailer 5
-
$18,873 AUD
View
B+
Retailer 6
-
$18,902 AUD
View
B+
Retailer 7
-
$19,629 AUD
View
Most Expensive
B
NZ Jewellers
bc6e3633-406c-408e-83f6-801bcb065360 · Nov 2
$26,346 AUD
$18,443 USD
View
7 more retailers have this diamond
Prices start from $13,565 AUDSave up to $12,781 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.

A
3.18ct Round
$13,565 AUD