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Round|Natural|IGI

1.59ct K IF Round Natural Diamond

EX • K/IF • IGI 550259521

Shape and cutting style on the report: Round brilliant

Certificate IGI 550259521

Diamond specifications and retailer prices

From $4,883 AUD
As of November 6, 2026
Save $4,313 AUD (47%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $9,581 AUD at NZ Jewellers · As of September 19, 2026
View at NZ Jewellers

About this 1.59ct natural round diamond

This 1.59ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI 550259521. Listed at 15 retailers as of November 2, 2026, with a 88% 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

1.59
Carat
K
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle40.9°
OriginNatural
Grading LabIGI
CertificateIGI 550259521
Dimensions7.44 × 7.38 × 4.64 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
7.44 mm7.38 mm1.59 ctK / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 550259521
Side View
Table 57.5%Crown 35.6°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $5,605 AUD|Low: $4,943 AUD|High: $9,307 AUD|Avg: $6,275 AUD|+0.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 6$4,943 AUD
Retailer 8$4,980 AUD
Retailer 7$5,500 AUD
Retailer 1$5,605 AUD
Retailer 4$6,321 AUD
Retailer 2$6,387 AUD
Retailer 3$6,713 AUD
Retailer 5$9,195 AUD

42 data points across 8 retailers

15 retailers$4,883 AUD to $9,195 AUD

A
Cheapest Retailer
-
$4,883 AUD
A
Retailer 2
-
$4,885 AUD
View
A
Retailer 3
-
$4,943 AUD
View
A
Retailer 4
-
$4,980 AUD
View
Retailer 5
-
$5,500 AUD
View
Price last confirmed 49 days ago
Retailer 6
-
$5,500 AUD
View
Price last confirmed 36 days ago
Retailer 7
-
$5,500 AUD
View
Price last confirmed 29 days ago
A
Retailer 8
-
$5,605 AUD
View
A
Retailer 9
-
$5,708 AUD
View
A
Retailer 10
-
$6,321 AUD
View
Retailer 11
-
$6,345 AUD
View
Price last confirmed 48 days ago
A
Retailer 12
-
$6,387 AUD
View
A
Retailer 13
-
$6,713 AUD
View
B+
Retailer 14
-
$9,195 AUD
View
Most Expensive
NZ Jewellers
15f82228-f07b-46ef-9d85-f97189fdb7e1 · Sep 19
$9,581 AUD
$6,707 USD
View
Price last confirmed 47 days ago
14 more retailers have this diamond
Prices start from $4,883 AUDSave up to $4,313 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
1.59ct Round
$4,883 AUD