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Radiant|Natural|GIA

1.51ct H SI1 Radiant Natural Diamond

EX • H/SI1 • GIA 6522977444

Certificate GIA 6522977444

Diamond specifications and retailer prices

From £4,717 GBP
As of November 6, 2026
Save £5,908 GBP (56%) vs most expensive(unlock to see where)
30 retailers carry this diamond
Most expensive: £10,625 GBP at NZ Jewellers · As of November 5, 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 6522977444. Listed at 30 retailers as of November 5, 2026, with prices from £4,717 to £10,625, a £5,908 spread on the same certified stone. NZ Jewellers lists it at £10,625. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6522977444
Dimensions7.64 × 5.66 × 3.77 mm
L/W Ratio1.35
Top View
7.64 mm5.66 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6522977444
Side View
Table 67.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.7%

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 6
Current: £5,940 GBP|Low: £5,019 GBP|High: £8,959 GBP|Avg: £6,581 GBP|-1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 5£5,019 GBP
Retailer 8£5,079 GBP
Retailer 1£5,940 GBP
Retailer 2£5,953 GBP
Retailer 7£6,094 GBP
Retailer 3£6,901 GBP
Retailer 4£7,750 GBP
Retailer 6£8,829 GBP

37 data points across 8 retailers

30 retailers£4,717 GBP to £10,625 GBP

B+
Cheapest Retailer
-
£4,717 GBP
B+
Retailer 2
-
£4,929 GBP
View
B+
Retailer 3
-
£4,945 GBP
View
B+
Retailer 4
-
£5,019 GBP
View
B+
Retailer 5
-
£5,079 GBP
View
Final sale: no returns
B+
Retailer 6
-
£5,098 GBP
View
B+
Retailer 7
-
£5,245 GBP
View
B+
Retailer 8
-
£5,312 GBP
View
Retailer 9
-
£5,312 GBP
View
Price last confirmed 9 days ago
B+
Retailer 10
-
£5,357 GBP
View
B
Retailer 11
-
£5,658 GBP
View
B+
Retailer 12
-
£5,755 GBP
View
B+
Retailer 13
-
£5,843 GBP
View
B+
Retailer 14
-
£5,875 GBP
View
B+
Retailer 15
-
£5,940 GBP
View
B+
Retailer 16
-
£5,945 GBP
View
B+
Retailer 17
-
£5,953 GBP
View
B
Retailer 18
-
£6,085 GBP
View
Retailer 19
-
£6,094 GBP
View
Price last confirmed 16 days ago
B
Retailer 20
-
£6,343 GBP
View
B
Retailer 21
-
£6,343 GBP
View
B
Retailer 22
-
£6,416 GBP
View
B
Retailer 23
-
£6,552 GBP
View
B
Retailer 24
-
£6,640 GBP
View
B
Retailer 25
-
£6,901 GBP
View
Retailer 26
-
£6,996 GBP
View
Price last confirmed 15 days ago
B
Retailer 27
-
£7,009 GBP
View
B
Retailer 28
-
£7,750 GBP
View
B
Retailer 29
-
£8,829 GBP
View
Most Expensive
B
NZ Jewellers
187c7af1-6df5-4fe3-81b8-deb2d3b7cfab · Nov 5
£10,625 GBP
$14,221 USD
View
29 more retailers have this diamond
Prices start from £4,717 GBPSave up to £5,908 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+
1.51ct Radiant
£4,717 GBP