CaratHunter
Plans
Round|Natural|GIA

2.51ct L SI1 Round Natural Diamond

EX • L/SI1 • GIA 6555007631

Certificate GIA 6555007631

Diamond specifications and retailer prices

From £3,519 GBP
As of November 4, 2026
Save £4,496 GBP (56%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £8,729 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 6555007631. Listed at 15 retailers as of November 4, 2026, with a 128% 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
FluorescenceFaint
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6555007631
Dimensions8.56 × 8.63 × 5.40 mm
L/W Ratio1.01
Top View
8.56 mm8.63 mm2.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6555007631
Side View
Table 57.0%CrownGirdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 62.8%

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: £8,015 GBP|Low: £3,519 GBP|High: £8,729 GBP|Avg: £5,420 GBP|-8.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 4£3,519 GBP
Retailer 2£4,582 GBP
Retailer 3£4,792 GBP
Retailer 7£4,792 GBP
Retailer 6£5,023 GBP
Retailer 5£5,291 GBP
NZ Jewellers£8,015 GBP

38 data points across 7 retailers

15 retailers£3,519 GBP to £8,015 GBP

A
Cheapest Retailer
-
£3,519 GBP
A
Retailer 2
-
£4,582 GBP
View
A
Retailer 3
-
£4,792 GBP
View
A
Retailer 4
-
£4,792 GBP
View
Retailer 5
-
£4,863 GBP
View
Price last confirmed 8 days ago
A
Retailer 6
-
£5,023 GBP
View
A
Retailer 7
-
£5,075 GBP
View
Retailer 8
-
£5,077 GBP
View
Price last confirmed 30 days ago
Retailer 9
-
£5,148 GBP
View
Price last confirmed 38 days ago
Retailer 10
-
£5,227 GBP
View
Price last confirmed 38 days ago
A
Retailer 11
-
£5,291 GBP
View
B
Retailer 12
-
£8,015 GBP
View
Retailer 13
-
£8,134 GBP
View
Price last confirmed 10 days ago
Retailer 14
-
£8,491 GBP
View
Price last confirmed 26 days ago
Most Expensive
NZ Jewellers
644459cf-54cd-4e96-a75e-ebeba0d45fb3 · Sep 27
£8,729 GBP
$11,749 USD
View
Price last confirmed 40 days ago
14 more retailers have this diamond
Prices start from £3,519 GBPSave up to £4,496 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
2.51ct Round
£3,519 GBP