CaratHunter
Plans
Radiant|Natural|GIA

2.51ct H SI2 Radiant Natural Diamond

ID • H/SI2 • GIA 1435868522

Certificate GIA 1435868522

Diamond specifications and retailer prices

From £9,425 GBP
As of October 30, 2026
Save £4,186 GBP (31%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £13,611 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 2.51ct natural radiant diamond

This 2.51ct natural radiant sits in the two to three carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1435868522. Listed at 6 retailers as of October 30, 2026, with prices from £9,425 to £13,611, a £4,186 spread on the same certified stone. NZ Jewellers lists it at £13,611. 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
H
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.23°
Pavilion angle31.23°
OriginNatural
Grading LabGIA
CertificateGIA 1435868522
Dimensions8.69 × 6.80 × 4.54 mm
L/W Ratio1.28
Girdle conditionSlightly Thick
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
8.69 mm6.80 mm2.51 ctH / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1435868522
Side View
Table 67.0%Crown 47.23°Girdle: MED-STKPavilion 31.23°Culet: NoneDepth 66.8%

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: Oct 30
Current: £13,611 GBP|Low: £9,393 GBP|High: £14,195 GBP|Avg: £10,753 GBP|-4.1%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 2£9,425 GBP
Retailer 8£9,615 GBP
Retailer 3£9,639 GBP
Retailer 7£9,720 GBP
Retailer 9£9,750 GBP
Retailer 6£9,766 GBP
Retailer 11£9,799 GBP
Retailer 12£10,214 GBP
Retailer 4£10,580 GBP
Retailer 10£12,659 GBP
Retailer 5£12,822 GBP
NZ Jewellers£13,611 GBP

29 data points across 12 retailers

6 retailers£9,425 GBP to £13,611 GBP

A
Cheapest Retailer
-
£9,425 GBP
A
Retailer 2
-
£9,615 GBP
$12,883 USD
View
A
Retailer 3
-
£9,720 GBP
$13,024 USD
View
A
Retailer 4
-
£9,766 GBP
$13,085 USD
View
A
Retailer 5
-
£12,822 GBP
View
Most Expensive
A
NZ Jewellers
1b3611f2-f6e1-4370-a6bf-9ffa9a53cd55 · Oct 30
£13,611 GBP
$18,237 USD
View
5 more retailers have this diamond
Prices start from £9,425 GBPSave up to £4,186 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 Radiant
£9,425 GBP