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Marquise|Natural|HRD

1.21ct K SI2 Marquise Natural Diamond

ID • K/SI2 • HRD 260000155347

Certificate HRD 260000155347

Diamond specifications and retailer prices

From $2,183 AUD
As of November 5, 2026
Save $1,639 AUD (43%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $5,523 AUD at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-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 260000155347. Listed at 7 retailers as of November 2, 2026, with a 75% 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

1.21
Carat
K
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle39.62°
Pavilion angle40.2°
OriginNatural
Grading LabHRD
CertificateHRD 260000155347
Dimensions10.12 × 5.53 × 3.63 mm
L/W Ratio1.83
Girdle conditionThick
Top View
10.12 mm5.53 mm1.21 ctK / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateHRD 260000155347
Side View
Table 58.0%Crown 39.62°GirdlePavilion 40.2°CuletDepth 65.7%

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: $3,822 AUD|Low: $2,183 AUD|High: $4,015 AUD|Avg: $3,089 AUD|-4.7%
Retailer 1
Retailer 2
November 1, 2026
Retailer 2$2,183 AUD
Retailer 1$3,822 AUD

10 data points across 2 retailers

7 retailers$2,183 AUD to $3,822 AUD

A
Cheapest Retailer
-
$2,183 AUD
Retailer 2
-
$2,265 AUD
View
Price last confirmed 46 days ago
Retailer 3
-
$2,265 AUD
View
Price last confirmed 30 days ago
Retailer 4
-
$2,369 AUD
View
Price last confirmed 37 days ago
B+
Retailer 5
-
$3,822 AUD
View
Retailer 6
-
$5,523 AUD
View
Price last confirmed 40 days ago
Most Expensive
NZ Jewellers
608ce706-e35a-402c-a352-43aca8763f42 · Sep 29
$5,523 AUD
$3,795 USD
View
Price last confirmed 38 days ago
6 more retailers have this diamond
Prices start from $2,183 AUDSave up to $1,639 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
1.21ct Marquise
$2,183 AUD