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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 £26,410 GBP
As of November 5, 2026
Save £5,074 GBP (16%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £31,484 GBP 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 £26,410 to £31,484, a £5,074 spread on the same certified stone. Aurelinne lists it at £31,484. 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: £31,484 GBP|Low: £26,410 GBP|High: £31,484 GBP|Avg: £29,284 GBP
Aurelinne
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 4, 2026
Retailer 4£26,410 GBP
Retailer 3£27,986 GBP
Retailer 6£29,152 GBP
Retailer 5£30,318 GBP
Retailer 2£30,659 GBP
Aurelinne£31,484 GBP

28 data points across 6 retailers

6 retailers£26,410 GBP to £31,484 GBP

A
Cheapest Retailer
-
£26,410 GBP
Retailer 2
-
£27,986 GBP
View
Price last confirmed 8 days ago
B+
Retailer 3
-
£29,152 GBP
View
B+
Retailer 4
-
£30,318 GBP
View
B+
Retailer 5
-
£30,659 GBP
View
Most Expensive
B+
Aurelinne
919bed03-8eae-49d0-a6be-0b281dc7f6ca · Nov 5
£31,484 GBP
$42,375 USD
View
5 more retailers have this diamond
Prices start from £26,410 GBPSave up to £5,074 GBP

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
£26,410 GBP