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Round|Natural|IGI

2.55ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 828654342

Shape and cutting style on the report: Round brilliant

Certificate IGI 828654342

Diamond specifications and retailer prices

From £5,167 GBP
As of November 5, 2026
Save £6,680 GBP (56%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £11,848 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 IGI 828654342. Listed at 16 retailers as of November 5, 2026, with prices from £5,167 to £11,848, a £6,680 spread on the same certified stone. NZ Jewellers lists it at £11,848. 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
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabIGI
CertificateIGI 828654342
Dimensions8.74 × 8.70 × 5.43 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
8.74 mm8.70 mm2.55 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 828654342
Side View
Table 60.0%Crown 35°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.2%

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 5
Current: £11,848 GBP|Low: £5,167 GBP|High: £12,096 GBP|Avg: £7,453 GBP|-2.1%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 11£5,167 GBP
Retailer 8£6,024 GBP
Retailer 5£6,116 GBP
Retailer 4£6,546 GBP
Retailer 6£6,552 GBP
Retailer 7£6,616 GBP
Retailer 2£6,779 GBP
Retailer 13£7,084 GBP
Retailer 3£7,206 GBP
Retailer 12£7,287 GBP
Retailer 15£7,335 GBP
Retailer 9£8,134 GBP
Retailer 10£8,174 GBP
Retailer 14£9,864 GBP
NZ Jewellers£11,848 GBP

17 data points across 15 retailers

16 retailers£5,167 GBP to £11,848 GBP

A
Cheapest Retailer
-
£5,167 GBP
Retailer 2
-
£5,351 GBP
View
Price last confirmed 23 days ago
A
Retailer 3
-
£6,024 GBP
View
A
Retailer 4
-
£6,116 GBP
View
A
Retailer 5
-
£6,546 GBP
View
A
Retailer 6
-
£6,552 GBP
View
Retailer 7
-
£6,616 GBP
View
Price last confirmed 8 days ago
A
Retailer 8
-
£6,779 GBP
View
A
Retailer 9
-
£7,084 GBP
View
A
Retailer 10
-
£7,206 GBP
View
A
Retailer 11
-
£7,287 GBP
View
A
Retailer 12
-
£7,335 GBP
View
A
Retailer 13
-
£8,134 GBP
View
A
Retailer 14
-
£8,174 GBP
View
B+
Retailer 15
-
£9,864 GBP
View
Most Expensive
B+
NZ Jewellers
41722f61-8fac-4ef7-af22-2433a7809c5f · Nov 5
£11,848 GBP
$15,946 USD
View
15 more retailers have this diamond
Prices start from £5,167 GBPSave up to £6,680 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
£5,167 GBP