Radiant|Natural|GIA

1.50ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 6552150956

Certificate GIA 6552150956

Diamond specifications and retailer prices

From £2,142 GBP
As of November 6, 2026
Save £2,583 GBP (55%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,983 GBP at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.5ct natural radiant diamond

This 1.5ct natural radiant sits in the one-and-a-half to two 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 6552150956. Listed at 20 retailers as of November 6, 2026, with a 121% 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

1.50
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552150956
Dimensions7.44 × 5.73 × 3.94 mm
L/W Ratio1.30
Top View
7.44 mm5.73 mm1.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6552150956
Side View
Table 67.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £4,983 GBP|Low: £2,142 GBP|High: £5,087 GBP|Avg: £3,143 GBP|-2.0%
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
November 7, 2026
Retailer 15£2,142 GBP
Retailer 10£2,266 GBP
Retailer 14£2,586 GBP
Retailer 4£2,622 GBP
Retailer 11£2,702 GBP
Retailer 6£2,861 GBP
Retailer 7£2,920 GBP
Retailer 9£2,940 GBP
Retailer 3£2,950 GBP
Retailer 2£3,021 GBP
Retailer 5£3,301 GBP
Retailer 12£3,307 GBP
Retailer 13£3,467 GBP
Retailer 8£4,725 GBP
NZ Jewellers£4,983 GBP

28 data points across 15 retailers

20 retailers£2,142 GBP to £4,725 GBP

A
Cheapest Retailer
-
£2,142 GBP
A
Retailer 2
-
£2,266 GBP
View
A
Retailer 3
-
£2,586 GBP
View
A
Retailer 4
-
£2,622 GBP
View
Final sale: no returns
B+
Retailer 5
-
£2,699 GBP
View
B+
Retailer 6
-
£2,701 GBP
View
A
Retailer 7
-
£2,702 GBP
View
B+
Retailer 8
-
£2,854 GBP
View
Retailer 9
-
£2,861 GBP
View
Price last confirmed 20 days ago
Retailer 10
-
£2,920 GBP
View
Price last confirmed 22 days ago
Retailer 11
-
£2,920 GBP
View
Price last confirmed 22 days ago
B+
Retailer 12
-
£2,940 GBP
View
B+
Retailer 13
-
£2,950 GBP
View
B+
Retailer 14
-
£3,021 GBP
View
Retailer 15
-
£3,148 GBP
View
Price last confirmed 30 days ago
Retailer 16
-
£3,301 GBP
View
Price last confirmed 19 days ago
B+
Retailer 17
-
£3,307 GBP
View
B+
Retailer 18
-
£3,467 GBP
View
B
Retailer 19
-
£4,725 GBP
View
Most Expensive
NZ Jewellers
6ec3da5f-792f-46e1-8095-fd586e4f06d1 · Oct 17
£4,983 GBP
$6,670 USD
View
Price last confirmed 20 days ago
19 more retailers have this diamond
Prices start from £2,142 GBPSave up to £2,583 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
1.50ct Radiant
£2,142 GBP