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Round|Natural|GIA

1.00ct J SI2 Round Natural Diamond

VG • J/SI2 • GIA 1559494856

Certificate GIA 1559494856

Diamond specifications and retailer prices

From $1,901 AUD
As of November 6, 2026
Save $4,134 AUD (68%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $6,035 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by GIA 1559494856. Listed at 20 retailers as of November 5, 2026, with prices from $1,901 to $6,035, a $4,134 spread on the same certified stone. NZ Jewellers lists it at $6,035. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
J
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle38°
Pavilion angle40.2°
OriginNatural
Grading LabGIA
CertificateGIA 1559494856
Dimensions6.18 × 6.24 × 3.98 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Feather, Crystal, Cavity, Needle, Indented Natural, Natural
Top View
6.18 mm6.24 mm1.00 ctJ / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1559494856
Side View
Table 59.0%Crown 38°Girdle: STK-THKPavilion 40.2°Culet: NoneDepth 64.1%

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: $1,913 AUD|Low: $1,901 AUD|High: $4,388 AUD|Avg: $2,753 AUD|-3.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 10$1,901 AUD
Retailer 1$1,913 AUD
Retailer 2$2,283 AUD
Retailer 7$2,317 AUD
Retailer 11$2,466 AUD
Retailer 4$2,654 AUD
Retailer 5$2,730 AUD
Retailer 3$2,756 AUD
Retailer 6$2,874 AUD
Retailer 8$3,250 AUD
Retailer 9$4,323 AUD

32 data points across 11 retailers

20 retailers$1,901 AUD to $6,035 AUD

A
Cheapest Retailer
-
$1,901 AUD
A
Retailer 2
-
$1,913 AUD
View
B+
Retailer 3
-
$2,254 AUD
View
B+
Retailer 4
-
$2,283 AUD
View
Final sale: no returns
B+
Retailer 5
-
$2,317 AUD
View
B+
Retailer 6
-
$2,466 AUD
View
B+
Retailer 7
-
$2,474 AUD
View
Retailer 8
-
$2,474 AUD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
$2,588 AUD
View
B+
Retailer 10
-
$2,654 AUD
View
B+
Retailer 11
-
$2,670 AUD
View
B+
Retailer 12
-
$2,696 AUD
View
B+
Retailer 13
-
$2,730 AUD
View
B+
Retailer 14
-
$2,756 AUD
View
B+
Retailer 15
-
$2,856 AUD
View
B+
Retailer 16
-
$2,874 AUD
View
B
Retailer 17
-
$3,250 AUD
View
B
Retailer 18
-
$3,686 AUD
View
B
Retailer 19
-
$4,323 AUD
View
Most Expensive
C
NZ Jewellers
487f54e0-6499-4d20-a69f-4a5bfdf0dac6 · Nov 5
$6,035 AUD
$4,225 USD
View
19 more retailers have this diamond
Prices start from $1,901 AUDSave up to $4,134 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.

A
1.00ct Round
$1,901 AUD