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Round|Natural|GIA

2.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 5546047512

Certificate GIA 5546047512

Diamond specifications and retailer prices

From £5,606 GBP
As of November 4, 2026
Save £4,344 GBP (44%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £10,588 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5546047512. Listed at 14 retailers as of November 4, 2026, with a 77% 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

2.51
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5546047512
Dimensions8.60 × 8.65 × 5.41 mm
L/W Ratio1.01
Top View
8.60 mm8.65 mm2.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5546047512
Side View
Table 59.0%CrownGirdlePavilionCulet: NDepth 62.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £6,573 GBP|Low: £5,606 GBP|High: £10,041 GBP|Avg: £7,322 GBP|-4.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 5£5,606 GBP
Retailer 7£5,617 GBP
Retailer 8£6,330 GBP
Retailer 6£6,380 GBP
Retailer 1£6,573 GBP
Retailer 4£7,196 GBP
Retailer 2£7,762 GBP
Retailer 9£8,362 GBP
Retailer 3£9,950 GBP

37 data points across 9 retailers

14 retailers£5,606 GBP to £9,950 GBP

A
Cheapest Retailer
-
£5,606 GBP
A
Retailer 2
-
£5,617 GBP
View
A
Retailer 3
-
£6,330 GBP
View
Retailer 4
-
£6,353 GBP
View
Price last confirmed 29 days ago
A
Retailer 5
-
£6,380 GBP
View
A
Retailer 6
-
£6,573 GBP
View
Retailer 7
-
£6,882 GBP
View
Price last confirmed 29 days ago
Retailer 8
-
£6,988 GBP
View
Price last confirmed 38 days ago
A
Retailer 9
-
£7,196 GBP
View
A
Retailer 10
-
£7,762 GBP
View
Retailer 11
-
£7,940 GBP
View
Price last confirmed 38 days ago
Retailer 12
-
£8,362 GBP
View
Price last confirmed 14 days ago
B+
Retailer 13
-
£9,950 GBP
View
Most Expensive
NZ Jewellers
29289aa4-f6d7-4c00-8cfe-0327b2998af7 · Sep 28
£10,588 GBP
$14,250 USD
View
Price last confirmed 39 days ago
13 more retailers have this diamond
Prices start from £5,606 GBPSave up to £4,344 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
2.51ct Round
£5,606 GBP