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Round|Natural|GIA

1.18ct J IF Round Natural Diamond

EX • J/IF • GIA 1558475450

Certificate GIA 1558475450

Diamond specifications and retailer prices

From $5,058 AUD
£2,798 GBP
As of November 1, 2026
Save $4,385 AUD (46%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $10,221 AUD at NZ Jewellers · As of August 29, 2026
View at NZ Jewellers

About this 1.18ct natural round diamond

This 1.18ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by GIA 1558475450. Listed at 10 retailers as of November 1, 2026, with a 87% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.18
Carat
J
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1558475450
Dimensions6.69 × 6.74 × 4.17 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Top View
6.69 mm6.74 mm1.18 ctJ / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1558475450
Side View
Table 58.0%Crown 36°GirdlePavilion 40.6°CuletDepth 62.1%

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 1
Current: $5,058 AUD|Low: $5,058 AUD|High: $9,834 AUD|Avg: $6,447 AUD|-3.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 1$5,058 AUD
Retailer 4$5,161 AUD
Retailer 3$5,388 AUD
Retailer 5$6,199 AUD
Retailer 6$6,210 AUD
Retailer 2$9,443 AUD

34 data points across 6 retailers

10 retailers$5,058 AUD to $9,443 AUD

A
Cheapest Retailer
-
$5,058 AUD
£2,798 GBP
B+
Retailer 2
-
$5,161 AUD
$3,625 USD
View
B+
Retailer 3
-
$5,388 AUD
$3,785 USD
View
Retailer 4
-
$5,781 AUD
$4,061 USD
View
Price last confirmed 33 days ago
Retailer 5
-
$5,781 AUD
$4,061 USD
View
Price last confirmed 26 days ago
Retailer 6
-
$5,838 AUD
$4,101 USD
View
Price last confirmed 62 days ago
Retailer 7
-
$6,199 AUD
View
Price last confirmed 29 days ago
B
Retailer 8
-
$9,443 AUD
£5,223 GBP
View
Retailer 9
-
$10,072 AUD
$7,075 USD
View
Price last confirmed 27 days ago
Most Expensive
NZ Jewellers
cedbc125-362d-4eff-a109-4627aff6a6d5 · Aug 29
$10,221 AUD
$7,180 USD
View
Price last confirmed 64 days ago
9 more retailers have this diamond
Prices start from $5,058 AUDSave up to $4,385 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
1.18ct Round
$5,058 AUD