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Round|Natural|GIA

1.50ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1518584498

Certificate GIA 1518584498

Diamond specifications and retailer prices

From £2,820 GBP
$3,779 USD
As of October 30, 2026
Save £3,576 GBP (56%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £6,397 GBP at NZ Jewellers · As of October 30, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1518584498. Listed at 21 retailers as of October 30, 2026, with prices from £2,820 to £6,397, a £3,576 spread on the same certified stone. NZ Jewellers lists it at £6,397. 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

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 1518584498
Dimensions7.32 × 7.35 × 4.55 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Girdle conditionFaceted
Key to symbols
Cavity, Crystal, Twinning Wisp, Feather, Etch Channel
Top View
7.32 mm7.35 mm1.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1518584498
Side View
Table 59.0%Crown 34°Girdle: STK-MEDPavilion 41.8°Culet: NoneDepth 62.0%

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: Oct 30
Current: £6,397 GBP|Low: £2,714 GBP|High: £6,397 GBP|Avg: £3,868 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
Retailer 18
October 31, 2026
Retailer 18£2,820 GBP
Retailer 14£2,839 GBP
Retailer 9£2,899 GBP
Retailer 4£3,070 GBP
Retailer 16£3,150 GBP
Retailer 3£3,326 GBP
Retailer 15£3,326 GBP
Retailer 17£3,326 GBP
Retailer 11£3,627 GBP
Retailer 10£3,780 GBP
Retailer 6£3,799 GBP
Retailer 7£3,838 GBP
Retailer 12£3,932 GBP
Retailer 8£4,054 GBP
Retailer 5£4,066 GBP
Retailer 2£4,513 GBP
Retailer 13£5,879 GBP
NZ Jewellers£6,397 GBP

34 data points across 18 retailers

21 retailers£2,820 GBP to £6,397 GBP

A
Cheapest Retailer
-
£2,820 GBP
$3,779 USD
A
Retailer 2
-
£2,839 GBP
$3,804 USD
View
A
Retailer 3
-
£2,899 GBP
$3,885 USD
View
B+
Retailer 4
-
£3,070 GBP
$4,114 USD
View
Final sale: no returns
B+
Retailer 5
-
£3,150 GBP
$4,220 USD
View
B+
Retailer 6
-
£3,326 GBP
$4,457 USD
View
B+
Retailer 7
-
£3,326 GBP
$4,457 USD
View
B+
Retailer 8
-
£3,326 GBP
$4,457 USD
View
B+
Retailer 9
-
£3,627 GBP
View
Retailer 10
-
£3,780 GBP
A$7,792 AUD
View
Price last confirmed 21 days ago
B
Retailer 11
-
£3,799 GBP
$5,090 USD
View
B
Retailer 12
-
£3,814 GBP
$5,110 USD
View
B
Retailer 13
-
£3,814 GBP
$5,110 USD
View
B
Retailer 14
-
£3,838 GBP
$5,142 USD
View
B
Retailer 15
-
£3,932 GBP
€5,018 EUR
View
B
Retailer 16
-
£3,941 GBP
$5,280 USD
View
Retailer 17
-
£4,054 GBP
$5,432 USD
View
Price last confirmed 8 days ago
B
Retailer 18
-
£4,066 GBP
View
B
Retailer 19
-
£4,513 GBP
ZAR 97,691 ZAR
View
B
Retailer 20
-
£5,879 GBP
View
Most Expensive
B
NZ Jewellers
7d3e9e2f-ec09-4aa1-a4fa-42166dbd9827 · Oct 30
£6,397 GBP
$8,571 USD
View
20 more retailers have this diamond
Prices start from £2,820 GBPSave up to £3,576 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 Round
£2,820 GBP