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Radiant|Natural|GIA

1.00ct H SI1 Radiant Natural Diamond

EX • H/SI1 • GIA 6552780350

Certificate GIA 6552780350

Diamond specifications and retailer prices

From £1,378 GBP
As of November 6, 2026
Save £1,812 GBP (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £3,189 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural radiant diamond

This 1ct natural radiant sits in the classic one-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 6552780350. Listed at 18 retailers as of November 5, 2026, with prices from £1,378 to £3,189, a £1,812 spread on the same certified stone. NZ Jewellers lists it at £3,189. 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

1.00
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6552780350
Dimensions6.59 × 4.94 × 3.39 mm
L/W Ratio1.33
Culet sizeNone
Key to symbols
Crystal, Indented Natural, Needle, Extra Facet
Top View
6.59 mm4.94 mm1.00 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6552780350
Side View
Table 67.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.6%

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 6
Current: £3,189 GBP|Low: £1,378 GBP|High: £3,189 GBP|Avg: £1,779 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 7, 2026
Retailer 6£1,378 GBP
Retailer 4£1,403 GBP
Retailer 9£1,408 GBP
Retailer 11£1,480 GBP
Retailer 14£1,526 GBP
Retailer 17£1,526 GBP
Retailer 5£1,550 GBP
Retailer 10£1,596 GBP
Retailer 2£1,657 GBP
Retailer 3£1,682 GBP
Retailer 8£1,698 GBP
Retailer 16£1,760 GBP
Retailer 7£1,801 GBP
Retailer 13£1,862 GBP
Retailer 12£1,943 GBP
Retailer 15£2,666 GBP
NZ Jewellers£3,189 GBP

27 data points across 17 retailers

18 retailers£1,378 GBP to £3,189 GBP

A
Cheapest Retailer
-
£1,378 GBP
A
Retailer 2
-
£1,403 GBP
View
A
Retailer 3
-
£1,408 GBP
View
Final sale: no returns
A
Retailer 4
-
£1,480 GBP
View
Retailer 5
-
£1,526 GBP
View
Price last confirmed 9 days ago
A
Retailer 6
-
£1,526 GBP
View
A
Retailer 7
-
£1,550 GBP
View
A
Retailer 8
-
£1,596 GBP
View
B+
Retailer 9
-
£1,657 GBP
View
B+
Retailer 10
-
£1,682 GBP
View
B+
Retailer 11
-
£1,698 GBP
View
B+
Retailer 12
-
£1,760 GBP
View
B+
Retailer 13
-
£1,801 GBP
View
B+
Retailer 14
-
£1,862 GBP
View
Retailer 15
-
£1,931 GBP
View
Price last confirmed 33 days ago
B+
Retailer 16
-
£1,943 GBP
View
B
Retailer 17
-
£2,666 GBP
View
Most Expensive
B
NZ Jewellers
8ffe8412-8051-4d5c-843b-f63e5083e8d0 · Nov 5
£3,189 GBP
$4,269 USD
View
17 more retailers have this diamond
Prices start from £1,378 GBPSave up to £1,812 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
1.00ct Radiant
£1,378 GBP