Round|Natural|GIA

2.50ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5516808668

Certificate GIA 5516808668

Diamond specifications and retailer prices

From £8,015 GBP
As of November 4, 2026
Save £4,420 GBP (36%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £13,176 GBP at NZ Jewellers · As of October 6, 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 5516808668. Listed at 10 retailers as of November 4, 2026, with a 55% 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

2.50
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5516808668
Dimensions8.60 × 8.53 × 5.39 mm
L/W Ratio1.01
Star length50%
Top View
8.60 mm8.53 mm2.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5516808668
Side View
Table 58.0%Crown 36°GirdlePavilion 40.8°Culet: NoneDepth 62.9%

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 4
Current: £9,135 GBP|Low: £7,209 GBP|High: £12,534 GBP|Avg: £9,148 GBP|-0.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 8£7,209 GBP
Retailer 7£8,015 GBP
Retailer 10£8,023 GBP
Retailer 9£8,102 GBP
Retailer 6£8,564 GBP
Retailer 1£9,135 GBP
Retailer 4£9,981 GBP
Retailer 2£10,834 GBP
Retailer 3£10,961 GBP
Retailer 5£12,435 GBP

23 data points across 10 retailers

10 retailers£8,015 GBP to £12,435 GBP

Retailer 1
-
£7,209 GBP
Price last confirmed 9 days ago
A
Retailer 2
-
£8,015 GBP
View
Retailer 3
-
£8,564 GBP
View
Price last confirmed 29 days ago
Retailer 4
-
£8,696 GBP
View
Price last confirmed 38 days ago
A
Retailer 5
-
£9,135 GBP
View
Retailer 6
-
£9,882 GBP
View
Price last confirmed 33 days ago
B+
Retailer 7
-
£9,981 GBP
View
B+
Retailer 8
-
£10,961 GBP
View
B
Retailer 9
-
£12,435 GBP
View
Most Expensive
NZ Jewellers
054bfbd2-230a-4ad5-b6b0-bc8dae8d540a · Oct 6
£13,176 GBP
$17,734 USD
View
Price last confirmed 31 days ago
9 more retailers have this diamond
Prices start from £8,015 GBPSave up to £4,420 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
£8,015 GBP