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Radiant|Natural|GIA

1.00ct J SI1 Radiant Natural Diamond

ID • J/SI1 • GIA 6551655996

Certificate GIA 6551655996

Diamond specifications and retailer prices

From £945 GBP
As of November 4, 2026
Save £362 GBP (28%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,307 GBP at Jared · As of November 6, 2026
View at Jared

About this 1ct natural radiant diamond

This 1ct natural radiant sits in the classic one-carat band, graded J 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 6551655996. Listed at 8 retailers as of November 4, 2026, with prices from £945 to £1,307, a £362 spread on the same certified stone. Jared lists it at £1,307. 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
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6551655996
Dimensions6.43 × 4.79 × 3.34 mm
L/W Ratio1.34
Culet sizeNone
Key to symbols
Crystal, Feather, Needle, Natural
Top View
6.43 mm4.79 mm1.00 ctJ / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6551655996
Side View
Table 68.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 69.8%

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: Nov 4
Current: £1,307 GBP|Low: £857 GBP|High: £1,367 GBP|Avg: £1,171 GBP|-4.4%
Jared
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 4, 2026
Retailer 2£945 GBP
Retailer 8£974 GBP
Retailer 4£1,091 GBP
Retailer 6£1,189 GBP
Retailer 7£1,218 GBP
Retailer 3£1,263 GBP
Retailer 5£1,263 GBP
Jared£1,307 GBP

17 data points across 8 retailers

8 retailers£945 GBP to £1,307 GBP

A
Cheapest Retailer
-
£945 GBP
A
Retailer 2
-
£974 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,091 GBP
View
B+
Retailer 4
-
£1,189 GBP
View
B+
Retailer 5
-
£1,218 GBP
View
B+
Retailer 6
-
£1,263 GBP
View
B+
Retailer 7
-
£1,263 GBP
View
Most Expensive
B+
Jared
159877343 · Nov 6
£1,307 GBP
$1,750 USD
View
7 more retailers have this diamond
Prices start from £945 GBPSave up to £362 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
£945 GBP