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Radiant|Natural|GIA

2.51ct H SI2 Radiant Natural Diamond

EX • H/SI2 • GIA 2225924502

Certificate GIA 2225924502

Diamond specifications and retailer prices

From £15,843 GBP
$21,228 USD
As of October 30, 2026
Save £3,981 GBP (20%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £19,824 GBP at 77 Diamonds · As of October 28, 2026
View at 77 Diamonds

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 2225924502. Listed at 7 retailers as of October 28, 2026, with prices from £15,843 to £19,824, a £3,981 spread on the same certified stone. 77 Diamonds lists it at £19,824. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2225924502
Dimensions8.78 × 6.70 × 4.76 mm
L/W Ratio1.31
Top View
8.78 mm6.70 mm2.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2225924502
Side View
Table 67.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 71.2%

Caratlytics Score

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

Price History

Last verified: Oct 30
Current: £19,824 GBP|Low: £15,843 GBP|High: £20,146 GBP|Avg: £17,697 GBP|+0.5%
77 Diamonds
Retailer 2
Retailer 3
October 31, 2026
Retailer 3£15,843 GBP
Retailer 2£16,877 GBP
77 Diamonds£19,824 GBP

46 data points across 3 retailers

7 retailers£15,843 GBP to £19,824 GBP

B+
Cheapest Retailer
-
£15,843 GBP
$21,228 USD
B+
Retailer 2
-
£16,848 GBP
$22,574 USD
View
B+
Retailer 3
-
£16,876 GBP
$22,612 USD
View
B+
Retailer 4
-
£16,877 GBP
₹2,153,619 INR
View
B+
Retailer 5
-
£17,012 GBP
$22,794 USD
View
B+
Retailer 6
-
£17,263 GBP
A$35,585 AUD
View
Most Expensive
B
77 Diamonds
RADMBUK5EESMW · Oct 28
£19,824 GBP
View
6 more retailers have this diamond
Prices start from £15,843 GBPSave up to £3,981 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 Radiant
£15,843 GBP