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Radiant|Natural|GIA

1.40ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 5556645666

Certificate GIA 5556645666

Diamond specifications and retailer prices

From £2,911 GBP
As of November 6, 2026
Save £3,452 GBP (54%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £6,363 GBP at NZ Jewellers · As of September 20, 2026
View at NZ Jewellers

About this 1.4ct natural radiant diamond

This 1.4ct natural radiant sits in the one-and-a-quarter to one-and-a-half 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 5556645666. Listed at 21 retailers as of November 5, 2026, with a 119% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.40
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5556645666
Dimensions7.45 × 5.44 × 3.77 mm
L/W Ratio1.37
Culet sizeNone
Top View
7.45 mm5.44 mm1.40 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 5556645666
Side View
Table 67.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.4%

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: £5,786 GBP|Low: £3,309 GBP|High: £5,887 GBP|Avg: £4,031 GBP|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 4£3,309 GBP
Retailer 8£3,309 GBP
Retailer 9£3,344 GBP
Retailer 10£3,473 GBP
Retailer 5£3,596 GBP
Retailer 3£3,606 GBP
Retailer 12£3,682 GBP
Retailer 11£3,858 GBP
Retailer 6£4,111 GBP
Retailer 7£4,456 GBP
Retailer 2£5,338 GBP
Retailer 1£5,786 GBP

45 data points across 12 retailers

21 retailers£2,911 GBP to £6,363 GBP

B+
Cheapest Retailer
-
£2,911 GBP
B+
Retailer 2
-
£3,108 GBP
View
B+
Retailer 3
-
£3,134 GBP
View
Retailer 4
-
£3,309 GBP
View
Price last confirmed 47 days ago
B
Retailer 5
-
£3,309 GBP
View
B
Retailer 6
-
£3,309 GBP
View
Retailer 7
-
£3,309 GBP
View
Price last confirmed 9 days ago
B
Retailer 8
-
£3,344 GBP
View
B
Retailer 9
-
£3,473 GBP
View
B+
Retailer 10
-
£3,596 GBP
View
Retailer 11
-
£3,682 GBP
View
Price last confirmed 29 days ago
B
Retailer 12
-
£3,818 GBP
View
Retailer 13
-
£3,818 GBP
View
Price last confirmed 47 days ago
B
Retailer 14
-
£3,858 GBP
View
Retailer 15
-
£4,032 GBP
View
Price last confirmed 15 days ago
B
Retailer 16
-
£4,111 GBP
View
B
Retailer 17
-
£4,456 GBP
View
B
Retailer 18
-
£5,338 GBP
View
B
Retailer 19
-
£5,786 GBP
View
B
Retailer 20
-
£6,363 GBP
View
Most Expensive
NZ Jewellers
52092677-de5d-4687-a4e5-a3e696dbc067 · Sep 20
£6,363 GBP
$8,517 USD
View
Price last confirmed 47 days ago
20 more retailers have this diamond
Prices start from £2,911 GBPSave up to £3,452 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+
1.40ct Radiant
£2,911 GBP