Radiant|Natural|GIA

1.50ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 6551029978

Certificate GIA 6551029978

Diamond specifications and retailer prices

From £2,199 GBP
As of November 6, 2026
Save £2,607 GBP (54%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £5,121 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 6551029978. Listed at 22 retailers as of November 6, 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

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

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6551029978
Dimensions7.43 × 5.72 × 3.99 mm
L/W Ratio1.30
Top View
7.43 mm5.72 mm1.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6551029978
Side View
Table 67.0%CrownGirdle: ThickPavilionCulet: 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 6
Current: £5,121 GBP|Low: £2,199 GBP|High: £5,121 GBP|Avg: £3,213 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£2,199 GBP
Retailer 13£2,327 GBP
Retailer 7£2,667 GBP
Retailer 3£2,675 GBP
Retailer 14£2,765 GBP
Retailer 15£2,777 GBP
Retailer 11£2,779 GBP
Retailer 12£2,926 GBP
Retailer 9£2,939 GBP
Retailer 4£2,999 GBP
Retailer 5£3,026 GBP
Retailer 2£3,073 GBP
Retailer 16£3,364 GBP
Retailer 8£3,391 GBP
Retailer 17£3,527 GBP
Retailer 10£4,806 GBP
NZ Jewellers£5,121 GBP

22 data points across 17 retailers

22 retailers£2,199 GBP to £4,806 GBP

A
Cheapest Retailer
-
£2,199 GBP
A
Retailer 2
-
£2,327 GBP
View
A
Retailer 3
-
£2,667 GBP
View
Final sale: no returns
A
Retailer 4
-
£2,675 GBP
View
A
Retailer 5
-
£2,765 GBP
View
A
Retailer 6
-
£2,777 GBP
View
A
Retailer 7
-
£2,779 GBP
View
B+
Retailer 8
-
£2,790 GBP
View
B+
Retailer 9
-
£2,926 GBP
View
Retailer 10
-
£2,939 GBP
View
Price last confirmed 20 days ago
B+
Retailer 11
-
£2,951 GBP
View
B+
Retailer 12
-
£2,999 GBP
View
Retailer 13
-
£3,018 GBP
View
Price last confirmed 22 days ago
Retailer 14
-
£3,018 GBP
View
Price last confirmed 22 days ago
B+
Retailer 15
-
£3,026 GBP
View
Retailer 16
-
£3,073 GBP
View
Retailer 17
-
£3,257 GBP
View
Price last confirmed 34 days ago
B+
Retailer 18
-
£3,364 GBP
View
Retailer 19
-
£3,391 GBP
View
Price last confirmed 19 days ago
B+
Retailer 20
-
£3,527 GBP
View
B
Retailer 21
-
£4,806 GBP
View
Most Expensive
NZ Jewellers
ac931774-ade8-4784-b7b9-72a207a8cfc0 · Oct 17
£5,121 GBP
$6,854 USD
View
Price last confirmed 20 days ago
21 more retailers have this diamond
Prices start from £2,199 GBPSave up to £2,607 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
£2,199 GBP