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Radiant|Natural|GIA

1.51ct H SI1 Radiant Natural Diamond

ID • H/SI1 • GIA 5563118999

Certificate GIA 5563118999

Diamond specifications and retailer prices

From £2,433 GBP
As of November 1, 2026
Save £2,161 GBP (47%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £4,595 GBP at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5563118999. Listed at 9 retailers as of November 1, 2026, with prices from £2,433 to £4,595, a £2,161 spread on the same certified stone. NZ Jewellers lists it at £4,595. 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

1.51
Carat
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle51.21°
Pavilion angle36.78°
OriginNatural
Grading LabGIA
CertificateGIA 5563118999
Dimensions7.52 × 5.79 × 3.92 mm
L/W Ratio1.30
Girdle conditionThick
Key to symbols
Crystal, Cavity, Feather, Needle, Natural
Top View
7.52 mm5.79 mm1.51 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 5563118999
Side View
Table 71.0%Crown 51.21°Girdle: MED-POLPavilion 36.78°Culet: NoneDepth 67.7%

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 1
Current: £4,595 GBP|Low: £2,406 GBP|High: £4,652 GBP|Avg: £3,161 GBP|-1.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 4, 2026
Retailer 5£2,433 GBP
Retailer 3£2,484 GBP
Retailer 2£2,607 GBP
Retailer 7£2,637 GBP
Retailer 9£2,697 GBP
Retailer 6£2,739 GBP
Retailer 8£2,824 GBP
Retailer 4£4,409 GBP
NZ Jewellers£4,595 GBP

35 data points across 9 retailers

9 retailers£2,433 GBP to £4,595 GBP

A
Cheapest Retailer
-
£2,433 GBP
A
Retailer 2
-
£2,484 GBP
View
A
Retailer 3
-
£2,607 GBP
View
A
Retailer 4
-
£2,637 GBP
View
A
Retailer 5
-
£2,697 GBP
View
A
Retailer 6
-
£2,739 GBP
View
Retailer 7
-
£2,824 GBP
View
Price last confirmed 30 days ago
B+
Retailer 8
-
£4,409 GBP
View
Most Expensive
B+
NZ Jewellers
f1ce2716-69c6-4751-816e-3e008bf35d4b · Nov 3
£4,595 GBP
$6,150 USD
View
8 more retailers have this diamond
Prices start from £2,433 GBPSave up to £2,161 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
1.51ct Radiant
£2,433 GBP