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5.51ct L SI1 Round Natural Diamond

EX • L/SI1 • HRD 260000090922

Certificate HRD 260000090922

Diamond specifications and retailer prices

From $50,777 AUD
As of November 5, 2026
Save $9,755 AUD (16%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $60,533 AUD at Aurelinne · As of November 5, 2026
View at Aurelinne

About this 5.51ct natural round diamond

This 5.51ct natural round sits in the over five carat band, graded L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by HRD 260000090922. Listed at 6 retailers as of November 5, 2026, with prices from $50,777 to $60,533, a $9,755 spread on the same certified stone. Aurelinne lists it at $60,533. 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

5.51
Carat
L
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.3°
Pavilion angle41.6°
OriginNatural
Grading LabHRD
CertificateHRD 260000090922
Dimensions11.44 × 11.32 × 6.95 mm
L/W Ratio1.01
Star length50%
Top View
11.44 mm11.32 mm5.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateHRD 260000090922
Side View
Table 59.0%Crown 32.3°GirdlePavilion 41.6°Culet: NoneDepth 61.1%

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: $60,533 AUD|Low: $50,777 AUD|High: $60,533 AUD|Avg: $56,303 AUD
Aurelinne
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 4, 2026
Retailer 4$50,777 AUD
Retailer 3$53,807 AUD
Retailer 6$56,049 AUD
Retailer 5$58,290 AUD
Retailer 2$58,947 AUD
Aurelinne$60,533 AUD

28 data points across 6 retailers

6 retailers$50,777 AUD to $60,533 AUD

A
Cheapest Retailer
-
$50,777 AUD
Retailer 2
-
$53,807 AUD
View
Price last confirmed 8 days ago
B+
Retailer 3
-
$56,049 AUD
View
B+
Retailer 4
-
$58,290 AUD
View
B+
Retailer 5
-
$58,947 AUD
View
Most Expensive
B+
Aurelinne
919bed03-8eae-49d0-a6be-0b281dc7f6ca · Nov 5
$60,533 AUD
$42,375 USD
View
5 more retailers have this diamond
Prices start from $50,777 AUDSave up to $9,755 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
5.51ct Round
$50,777 AUD