CaratHunter
Plans
Round|Natural|GIA

2.50ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6541799178

Certificate GIA 6541799178

Diamond specifications and retailer prices

From £7,451 GBP
As of November 6, 2026
Save £4,091 GBP (35%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £11,542 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 6541799178. Listed at 11 retailers as of November 5, 2026, with prices from £7,451 to £11,542, a £4,091 spread on the same certified stone. NZ Jewellers lists it at £11,542. 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
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6541799178
Dimensions8.68 × 8.64 × 5.42 mm
L/W Ratio1.00
Star length55%
Top View
8.68 mm8.64 mm2.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6541799178
Side View
Table 56.0%Crown 36.5°GirdlePavilion 40.6°Culet: NoneDepth 62.6%

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: £11,542 GBP|Low: £7,451 GBP|High: £11,542 GBP|Avg: £8,903 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 4£7,451 GBP
Retailer 9£7,645 GBP
Retailer 8£7,645 GBP
Retailer 2£7,925 GBP
Retailer 11£8,281 GBP
Retailer 3£8,409 GBP
Retailer 7£8,697 GBP
Retailer 5£9,510 GBP
Retailer 10£9,556 GBP
Retailer 6£10,787 GBP
NZ Jewellers£11,542 GBP

29 data points across 11 retailers

11 retailers£7,451 GBP to £11,542 GBP

A
Cheapest Retailer
-
£7,451 GBP
Retailer 2
-
£7,645 GBP
View
Price last confirmed 8 days ago
A
Retailer 3
-
£7,645 GBP
View
A
Retailer 4
-
£7,925 GBP
View
A
Retailer 5
-
£8,281 GBP
View
A
Retailer 6
-
£8,409 GBP
View
A
Retailer 7
-
£8,697 GBP
View
B+
Retailer 8
-
£9,510 GBP
View
B+
Retailer 9
-
£9,556 GBP
View
B+
Retailer 10
-
£10,787 GBP
View
Most Expensive
B+
NZ Jewellers
55130f87-974a-47b4-9126-a31325fafd30 · Nov 5
£11,542 GBP
$15,535 USD
View
10 more retailers have this diamond
Prices start from £7,451 GBPSave up to £4,091 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
£7,451 GBP