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Round|Natural|GIA

1.00ct J SI1 Round Natural Diamond

VG • J/SI1 • GIA 2554975138

Certificate GIA 2554975138

Diamond specifications and retailer prices

From $2,194 AUD
As of November 1, 2026
Save $2,991 AUD (58%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $6,188 AUD at NZ Jewellers · As of October 30, 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by GIA 2554975138. Listed at 20 retailers as of November 1, 2026, with a 136% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle33.5°
Pavilion angle39.8°
OriginNatural
Grading LabGIA
CertificateGIA 2554975138
Dimensions6.33 × 6.37 × 3.92 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
6.33 mm6.37 mm1.00 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2554975138
Side View
Table 54.0%Crown 33.5°Girdle: STK-THKPavilion 39.8°Culet: NoneDepth 61.7%

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 1
Current: $6,188 AUD|Low: $2,103 AUD|High: $6,947 AUD|Avg: $3,249 AUD|+1.0%
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
Retailer 19
Retailer 20
November 2, 2026
Retailer 19$2,194 AUD
Retailer 14$2,243 AUD
Retailer 16$2,600 AUD
Retailer 7$2,728 AUD
Retailer 5$2,733 AUD
Retailer 6$2,821 AUD
Retailer 4$2,827 AUD
Retailer 10$2,848 AUD
Retailer 3$2,851 AUD
Retailer 12$2,937 AUD
Retailer 18$2,960 AUD
Retailer 11$2,980 AUD
Retailer 13$3,228 AUD
Retailer 20$3,233 AUD
Retailer 8$3,286 AUD
Retailer 9$3,467 AUD
Retailer 15$3,610 AUD
Retailer 2$3,767 AUD
Retailer 17$5,185 AUD
NZ Jewellers$6,188 AUD

23 data points across 20 retailers

20 retailers$2,194 AUD to $5,185 AUD

A
Cheapest Retailer
-
$2,194 AUD
A
Retailer 2
-
$2,243 AUD
View
B+
Retailer 3
-
$2,600 AUD
View
Retailer 4
-
$2,728 AUD
View
Price last confirmed 6 days ago
B+
Retailer 5
-
$2,821 AUD
View
B+
Retailer 6
-
$2,827 AUD
View
Retailer 7
-
$2,848 AUD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$2,851 AUD
View
Retailer 9
-
$2,937 AUD
View
Price last confirmed 10 days ago
B+
Retailer 10
-
$2,960 AUD
View
Retailer 11
-
$2,980 AUD
View
Price last confirmed 8 days ago
B
Retailer 12
-
$3,228 AUD
View
B
Retailer 13
-
$3,233 AUD
View
Retailer 14
-
$3,286 AUD
View
Price last confirmed 10 days ago
Retailer 15
-
$3,467 AUD
View
Price last confirmed 11 days ago
B
Retailer 16
-
$3,610 AUD
View
Retailer 17
-
$3,630 AUD
View
Price last confirmed 37 days ago
B
Retailer 18
-
$3,767 AUD
View
B
Retailer 19
-
$5,185 AUD
View
Most Expensive
NZ Jewellers
a148374b-b900-4dbc-83f0-c2e03d05ae8b · Oct 30
$6,188 AUD
$4,332 USD
View
Price last confirmed 7 days ago
19 more retailers have this diamond
Prices start from $2,194 AUDSave up to $2,991 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
$2,194 AUD