Round|Natural|GIA

2.55ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 16

Certificate GIA 16

Diamond specifications and retailer prices

From £8,531 GBP
As of November 4, 2026
Save £6,345 GBP (43%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £14,876 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 2.55ct natural round diamond

This 2.55ct 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. Listed at 11 retailers as of November 4, 2026, with prices from £8,531 to £14,876, a £6,345 spread on the same certified stone. NZ Jewellers lists it at £14,876. 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

2.55
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 16
Dimensions8.94 × 8.98 × 5.27 mm
L/W Ratio1.00
Top View
8.94 mm8.98 mm2.55 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 16
Side View
Table 59.0%CrownGirdle: THN-MEDPavilionCulet: NoneDepth 58.9%

Caratlytics Score

How it works →
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: £14,876 GBP|Low: £8,531 GBP|High: £14,876 GBP|Avg: £10,359 GBP|+11.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 3£8,531 GBP
Retailer 5£8,926 GBP
Retailer 4£9,521 GBP
Retailer 6£9,670 GBP
Retailer 7£9,843 GBP
Retailer 2£11,048 GBP
NZ Jewellers£14,876 GBP

11 data points across 7 retailers

11 retailers£8,531 GBP to £14,876 GBP

A
Cheapest Retailer
-
£8,531 GBP
Retailer 2
-
£8,926 GBP
View
Price last confirmed 8 days ago
Retailer 3
-
£8,926 GBP
View
Price last confirmed 29 days ago
A
Retailer 4
-
£9,521 GBP
View
A
Retailer 5
-
£9,670 GBP
View
Retailer 6
-
£9,670 GBP
View
Price last confirmed 30 days ago
A
Retailer 7
-
£9,843 GBP
View
Retailer 8
-
£10,042 GBP
View
Price last confirmed 30 days ago
B+
Retailer 9
-
£11,048 GBP
View
Retailer 10
-
£13,400 GBP
View
Price last confirmed 31 days ago
Most Expensive
B
NZ Jewellers
7476029c-3922-4cf1-8c9b-6bb374f9ba40 · Nov 5
£14,876 GBP
$20,022 USD
View
10 more retailers have this diamond
Prices start from £8,531 GBPSave up to £6,345 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
2.55ct Round
£8,531 GBP