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Round|Natural|GIA

1.50ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 1515100506

Certificate GIA 1515100506

Diamond specifications and retailer prices

From £3,663 GBP
As of November 1, 2026
Save £4,342 GBP (54%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £8,005 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.5ct natural round diamond

This 1.5ct natural round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1515100506. Listed at 18 retailers as of November 1, 2026, with prices from £3,663 to £8,005, a £4,342 spread on the same certified stone. NZ Jewellers lists it at £8,005. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1515100506
Dimensions7.27 × 7.24 × 4.51 mm
L/W Ratio1.00
Star length55%
Lower girdle75%
Cert comments
Additional clouds are not shown. Pinpoints are not shown.
Key to symbols
Feather, Crystal, Indented Natural, Cavity, Cloud, Needle, Natural
Top View
7.27 mm7.24 mm1.50 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1515100506
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.2%

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 1
Current: £8,005 GBP|Low: £3,335 GBP|High: £8,005 GBP|Avg: £5,302 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7£3,663 GBP
Retailer 6£3,877 GBP
Retailer 8£4,002 GBP
Retailer 9£4,336 GBP
Retailer 3£4,489 GBP
Retailer 4£5,189 GBP
Retailer 2£6,159 GBP
Retailer 5£7,051 GBP
NZ Jewellers£8,005 GBP

42 data points across 9 retailers

18 retailers£3,663 GBP to £8,005 GBP

B+
Cheapest Retailer
-
£3,663 GBP
B+
Retailer 2
-
£3,781 GBP
View
B
Retailer 3
-
£3,877 GBP
View
B
Retailer 4
-
£4,002 GBP
View
Final sale: no returns
B
Retailer 5
-
£4,036 GBP
View
Retailer 6
-
£4,336 GBP
View
Price last confirmed 21 days ago
B
Retailer 7
-
£4,336 GBP
View
B
Retailer 8
-
£4,336 GBP
View
B+
Retailer 9
-
£4,489 GBP
View
B
Retailer 10
-
£4,837 GBP
View
B
Retailer 11
-
£4,837 GBP
View
B
Retailer 12
-
£5,000 GBP
View
B
Retailer 13
-
£5,003 GBP
View
B
Retailer 14
-
£5,189 GBP
View
Retailer 15
-
£5,277 GBP
View
Price last confirmed 14 days ago
B
Retailer 16
-
£6,159 GBP
View
B
Retailer 17
-
£7,051 GBP
View
Most Expensive
B
NZ Jewellers
906b3ef9-9193-40ff-b4d3-cb703e82cc8f · Nov 5
£8,005 GBP
$10,774 USD
View
17 more retailers have this diamond
Prices start from £3,663 GBPSave up to £4,342 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+
1.50ct Round
£3,663 GBP