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Round|Natural|GIA

1.51ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6501583878

Certificate GIA 6501583878

Diamond specifications and retailer prices

From $8,307 AUD
$5,835 USD
As of November 1, 2026
Save $9,403 AUD (53%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $17,710 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct 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 6501583878. Listed at 18 retailers as of October 30, 2026, with prices from $8,307 to $17,710, a $9,403 spread on the same certified stone. NZ Jewellers lists it at $17,710. 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

1.51
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6501583878
Dimensions7.35 × 7.30 × 4.60 mm
L/W Ratio1.01
Top View
7.35 mm7.30 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6501583878
Side View
Table 57.0%Crown 33.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.8%

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: $9,916 AUD|Low: $8,307 AUD|High: $14,934 AUD|Avg: $10,761 AUD|-0.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 9$8,307 AUD
Retailer 11$8,366 AUD
Retailer 10$8,898 AUD
Retailer 2$9,740 AUD
Retailer 1$9,916 AUD
Retailer 3$10,153 AUD
Retailer 8$10,277 AUD
Retailer 6$11,519 AUD
Retailer 4$12,647 AUD
Retailer 7$13,010 AUD
Retailer 5$14,757 AUD

36 data points across 11 retailers

18 retailers$8,307 AUD to $17,710 AUD

B+
Cheapest Retailer
-
$8,307 AUD
$5,835 USD
B+
Retailer 2
-
$8,366 AUD
$5,877 USD
View
B
Retailer 3
-
$8,855 AUD
$6,220 USD
View
B
Retailer 4
-
$8,898 AUD
$6,250 USD
View
B
Retailer 5
-
$9,438 AUD
$6,630 USD
View
B
Retailer 6
-
$9,592 AUD
$6,738 USD
View
B
Retailer 7
-
$9,740 AUD
$6,842 USD
View
B
Retailer 8
-
$9,916 AUD
£5,485 GBP
View
B
Retailer 9
-
$10,153 AUD
$7,132 USD
View
Retailer 10
-
$10,277 AUD
View
Price last confirmed 11 days ago
Retailer 11
-
$11,068 AUD
$7,775 USD
View
Price last confirmed 56 days ago
B
Retailer 12
-
$11,068 AUD
$7,775 USD
View
B
Retailer 13
-
$11,519 AUD
€7,706 EUR
View
Retailer 14
-
$11,668 AUD
$8,196 USD
View
Price last confirmed 10 days ago
B
Retailer 15
-
$12,647 AUD
£6,995 GBP
View
B
Retailer 16
-
$13,010 AUD
ZAR 147,633 ZAR
View
B
Retailer 17
-
$14,757 AUD
£8,162 GBP
View
Most Expensive
B
NZ Jewellers
f4d4f422-75b9-49b3-bb55-82b45c3d718f · Oct 30
$17,710 AUD
$12,440 USD
View
17 more retailers have this diamond
Prices start from $8,307 AUDSave up to $9,403 AUD

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+
1.51ct Round
$8,307 AUD