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Round|Natural|GIA

1.18ct J IF Round Natural Diamond

EX • J/IF • GIA 6512176143

Certificate GIA 6512176143

Diamond specifications and retailer prices

From $5,608 AUD
$3,939 USD
As of October 31, 2026
Save $4,553 AUD (45%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $10,584 AUD at NZ Jewellers · As of October 3, 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 6512176143. Listed at 6 retailers as of October 31, 2026, with a 81% 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 angle36.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6512176143
Dimensions6.68 × 6.72 × 4.25 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.68 mm6.72 mm1.18 ctJ / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6512176143
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.4%

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: Oct 31
Current: $6,517 AUD|Low: $4,436 AUD|High: $10,282 AUD|Avg: $6,877 AUD|+1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 2, 2026
Retailer 4$5,608 AUD
Retailer 5$5,692 AUD
Retailer 1$6,517 AUD
Retailer 3$6,879 AUD
Retailer 2$10,161 AUD

27 data points across 5 retailers

6 retailers$5,608 AUD to $10,161 AUD

B+
Cheapest Retailer
-
$5,608 AUD
$3,939 USD
Final sale: no returns
B+
Retailer 2
-
$5,692 AUD
$3,998 USD
View
B+
Retailer 3
-
$6,517 AUD
€4,360 EUR
View
B+
Retailer 4
-
$6,879 AUD
£3,805 GBP
View
B
Retailer 5
-
$10,161 AUD
£5,620 GBP
View
Most Expensive
NZ Jewellers
d922769b-9c5b-4499-82a7-10200cf9001b · Oct 3
$10,584 AUD
$7,435 USD
View
Price last confirmed 30 days ago
5 more retailers have this diamond
Prices start from $5,608 AUDSave up to $4,553 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+
1.18ct Round
$5,608 AUD