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Round|Natural|GIA

1.64ct E IF Round Natural Diamond

EX • E/IF • GIA 6171266239

Certificate GIA 6171266239

Diamond specifications and retailer prices

From $30,301 AUD
$21,310 USD
As of October 25, 2026
Save $45,183 AUD (60%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $75,484 AUD at Diamond Quarter · As of October 28, 2026
View at Diamond Quarter

About this 1.64ct natural round diamond

This 1.64ct natural round sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by GIA 6171266239. Listed at 7 retailers as of October 25, 2026, with prices from $30,301 to $75,484, a $45,183 spread on the same certified stone. Diamond Quarter lists it at $75,484. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.64
Carat
E
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6171266239
Dimensions7.59 × 7.56 × 4.63 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
7.59 mm7.56 mm1.64 ctE / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6171266239
Side View
Table 59.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.1%

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: Oct 25
Current: $54,561 AUD|Low: $30,301 AUD|High: $54,924 AUD|Avg: $37,965 AUD|+0.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 29, 2026
Retailer 4$30,301 AUD
Retailer 6$31,138 AUD
Retailer 3$34,893 AUD
Retailer 5$35,582 AUD
Retailer 2$41,932 AUD
Retailer 1$54,561 AUD

41 data points across 6 retailers

7 retailers$30,301 AUD to $75,484 AUD

A
Cheapest Retailer
-
$30,301 AUD
$21,310 USD
A
Retailer 2
-
$34,893 AUD
£19,322 GBP
View
B+
Retailer 3
-
$35,582 AUD
View
Price last confirmed 25 days ago
B+
Retailer 4
-
$38,771 AUD
$27,267 USD
View
B+
Retailer 5
-
$41,932 AUD
€28,086 EUR
View
B
Retailer 6
-
$54,561 AUD
£30,214 GBP
View
Most Expensive
B
Diamond Quarter
1.64IFE6139013CN · Oct 28
$75,484 AUD
£41,800 GBP
View
6 more retailers have this diamond
Prices start from $30,301 AUDSave up to $45,183 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
1.64ct Round
$30,301 AUD