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Round|Natural|GIA

2.50ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6555439015

Certificate GIA 6555439015

Diamond specifications and retailer prices

From £8,890 GBP
As of November 6, 2026
Save £5,046 GBP (36%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £13,936 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 2.5ct natural round diamond

This 2.5ct natural round sits in the two to three carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6555439015. Listed at 11 retailers as of November 5, 2026, with prices from £8,890 to £13,936, a £5,046 spread on the same certified stone. NZ Jewellers lists it at £13,936. 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

2.50
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555439015
Dimensions8.65 × 8.71 × 5.36 mm
L/W Ratio1.01
Culet sizeNone
Top View
8.65 mm8.71 mm2.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555439015
Side View
Table 55.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 61.8%

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 6
Current: £13,936 GBP|Low: £8,890 GBP|High: £13,936 GBP|Avg: £10,619 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 5£8,890 GBP
Retailer 9£9,230 GBP
Retailer 8£9,232 GBP
Retailer 2£9,568 GBP
Retailer 3£9,845 GBP
Retailer 11£9,999 GBP
Retailer 10£10,383 GBP
Retailer 6£10,455 GBP
Retailer 4£11,481 GBP
Retailer 7£13,024 GBP
NZ Jewellers£13,936 GBP

29 data points across 11 retailers

11 retailers£8,890 GBP to £13,936 GBP

A
Cheapest Retailer
-
£8,890 GBP
Retailer 2
-
£9,230 GBP
View
Price last confirmed 8 days ago
A
Retailer 3
-
£9,232 GBP
View
A
Retailer 4
-
£9,568 GBP
View
B+
Retailer 5
-
£9,845 GBP
View
B+
Retailer 6
-
£9,999 GBP
View
B+
Retailer 7
-
£10,383 GBP
View
B+
Retailer 8
-
£10,455 GBP
View
B+
Retailer 9
-
£11,481 GBP
View
B
Retailer 10
-
£13,024 GBP
View
Most Expensive
B
NZ Jewellers
cc57180c-0f92-4f30-aad4-34c218e72643 · Nov 5
£13,936 GBP
$18,757 USD
View
10 more retailers have this diamond
Prices start from £8,890 GBPSave up to £5,046 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
2.50ct Round
£8,890 GBP