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Marquise|Natural|HRD

1.51ct K SI2 Marquise Natural Diamond

ID • K/SI2 • HRD 260000120840

Certificate HRD 260000120840

Diamond specifications and retailer prices

From $4,838 AUD
As of November 1, 2026
Save $4,275 AUD (47%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $9,494 AUD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise 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 260000120840. Listed at 11 retailers as of November 1, 2026, with a 88% 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

1.51
Carat
K
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
Crown angle40.95°
Pavilion angle40.56°
OriginNatural
Grading LabHRD
CertificateHRD 260000120840
Dimensions10.42 × 5.89 × 3.99 mm
L/W Ratio1.77
Girdle conditionVery Thick
Top View
10.42 mm5.89 mm1.51 ctK / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateHRD 260000120840
Side View
Table 60.0%Crown 40.95°GirdlePavilion 40.56°Culet: NoneDepth 67.8%

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 1
Current: $9,494 AUD|Low: $4,266 AUD|High: $9,494 AUD|Avg: $6,001 AUD|+6.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 11$4,285 AUD
Retailer 3$4,439 AUD
Retailer 9$4,838 AUD
Retailer 10$5,052 AUD
Retailer 4$5,449 AUD
Retailer 8$5,449 AUD
Retailer 7$5,659 AUD
Retailer 6$6,287 AUD
Retailer 2$6,376 AUD
Retailer 5$9,112 AUD
NZ Jewellers$9,494 AUD

34 data points across 11 retailers

11 retailers$4,838 AUD to $9,112 AUD

B+
Cheapest Retailer
-
$4,838 AUD
B+
Retailer 2
-
$5,052 AUD
View
A
Retailer 3
-
$5,449 AUD
View
Retailer 4
-
$5,449 AUD
View
Price last confirmed 20 days ago
Retailer 5
-
$5,449 AUD
View
Price last confirmed 13 days ago
Retailer 6
-
$5,659 AUD
View
Price last confirmed 9 days ago
B+
Retailer 7
-
$6,287 AUD
View
B+
Retailer 8
-
$6,376 AUD
View
B
Retailer 9
-
$9,112 AUD
View
Retailer 10
-
$9,494 AUD
View
Price last confirmed 8 days ago
Most Expensive
NZ Jewellers
4057d7b5-d185-4d5f-9ce4-0913e573b37c · Oct 17
$9,494 AUD
$6,523 USD
View
Price last confirmed 20 days ago
10 more retailers have this diamond
Prices start from $4,838 AUDSave up to $4,275 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
1.51ct Marquise
$4,838 AUD