Round|Natural|GIA

2.51ct L SI1 Round Natural Diamond

EX • L/SI1 • GIA 5242015916

Certificate GIA 5242015916

Diamond specifications and retailer prices

From £7,822 GBP
As of November 5, 2026
Save £2,154 GBP (22%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £12,109 GBP at NZ Jewellers · As of September 27, 2026
View at NZ Jewellers

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5242015916. Listed at 13 retailers as of November 5, 2026, with a 28% 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

2.51
Carat
L
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 5242015916
Dimensions8.70 × 8.63 × 5.40 mm
L/W Ratio1.01
Star length50%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
8.70 mm8.63 mm2.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5242015916
Side View
Table 58.0%Crown 34°Girdle: Slightly ThickPavilion 41.4°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £8,314 GBP|Low: £7,822 GBP|High: £10,046 GBP|Avg: £8,596 GBP|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4£7,822 GBP
Retailer 6£7,917 GBP
Retailer 5£8,020 GBP
Retailer 1£8,314 GBP
Retailer 3£9,094 GBP
Retailer 2£9,976 GBP

44 data points across 6 retailers

13 retailers£7,822 GBP to £9,976 GBP

B+
Cheapest Retailer
-
£7,822 GBP
B+
Retailer 2
-
£7,917 GBP
View
Retailer 3
-
£8,020 GBP
View
Price last confirmed 12 days ago
Retailer 4
-
£8,020 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£8,314 GBP
View
Retailer 6
-
£8,688 GBP
View
Price last confirmed 36 days ago
Retailer 7
-
£8,822 GBP
View
Price last confirmed 38 days ago
B+
Retailer 8
-
£9,094 GBP
View
B
Retailer 9
-
£9,976 GBP
View
Retailer 10
-
£10,024 GBP
View
Price last confirmed 59 days ago
Retailer 11
-
£10,024 GBP
View
Price last confirmed 38 days ago
Retailer 12
-
£12,109 GBP
View
Price last confirmed 69 days ago
Most Expensive
NZ Jewellers
5ccf45e2-24c4-4b0c-8144-392015112acd · Sep 27
£12,109 GBP
$16,298 USD
View
Price last confirmed 40 days ago
12 more retailers have this diamond
Prices start from £7,822 GBPSave up to £2,154 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.

B+
2.51ct Round
£7,822 GBP