Round|Natural|GIA

1.50ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1518584498

Certificate GIA 1518584498

Diamond specifications and retailer prices

From $3,779 USD
As of October 30, 2026
Save $4,792 USD (56%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $8,571 USD 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 $3,779 to $8,571, a $4,792 spread on the same certified stone. NZ Jewellers lists it at $8,571. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $8,571 USD|Low: $3,637 USD|High: $8,571 USD|Avg: $5,235 USD
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 30, 2026
Retailer 18$3,779 USD
Retailer 14$3,804 USD
Retailer 9$3,885 USD
Retailer 4$4,114 USD
Retailer 16$4,220 USD
Retailer 3$4,457 USD
Retailer 15$4,457 USD
Retailer 17$4,457 USD
Retailer 2$4,860 USD
Retailer 10$5,064 USD
Retailer 6$5,090 USD
Retailer 7$5,142 USD
Retailer 11$5,269 USD
Retailer 8$5,432 USD
Retailer 5$5,448 USD
Retailer 13$5,991 USD
Retailer 12$7,878 USD
NZ Jewellers$8,571 USD

33 data points across 18 retailers

21 retailers$3,779 USD to $8,571 USD

A
Cheapest Retailer
-
$3,779 USD
A
Retailer 2
-
$3,804 USD
View
A
Retailer 3
-
$3,885 USD
View
B+
Retailer 4
-
$4,114 USD
View
Final sale: no returns
B+
Retailer 5
-
$4,220 USD
View
B+
Retailer 6
-
$4,457 USD
View
B+
Retailer 7
-
$4,457 USD
View
B+
Retailer 8
-
$4,457 USD
View
B+
Retailer 9
-
$4,860 USD
£3,827 GBP
View
Retailer 10
-
$5,064 USD
A$7,792 AUD
View
Price last confirmed 21 days ago
B
Retailer 11
-
$5,090 USD
View
B
Retailer 12
-
$5,110 USD
View
B
Retailer 13
-
$5,110 USD
View
B
Retailer 14
-
$5,142 USD
View
B
Retailer 15
-
$5,269 USD
€5,018 EUR
View
B
Retailer 16
-
$5,280 USD
View
Retailer 17
-
$5,432 USD
View
Price last confirmed 7 days ago
B
Retailer 18
-
$5,448 USD
£4,290 GBP
View
B
Retailer 19
-
$5,991 USD
ZAR 96,778 ZAR
View
B
Retailer 20
-
$7,878 USD
£6,203 GBP
View
Most Expensive
B
NZ Jewellers
7d3e9e2f-ec09-4aa1-a4fa-42166dbd9827 · Oct 30
$8,571 USD
View
20 more retailers have this diamond
Prices start from $3,779 USDSave up to $4,792 USD

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
$3,779 USD