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Round|Natural|GIA

1.51ct K IF Round Natural Diamond

EX • K/IF • GIA 6555600975

Certificate GIA 6555600975

Diamond specifications and retailer prices

From $6,855 AUD
As of November 6, 2026
Save $2,541 AUD (27%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $9,397 AUD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 1.51ct natural round diamond

This 1.51ct 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 GIA 6555600975. Listed at 8 retailers as of November 5, 2026, with prices from $6,855 to $9,397, a $2,541 spread on the same certified stone. Blue Nile lists it at $9,397. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
K
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6555600975
Dimensions7.29 × 7.26 × 4.56 mm
L/W Ratio1.00
Culet sizeNone
Top View
7.29 mm7.26 mm1.51 ctK / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555600975
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.7%

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 6
Current: $9,397 AUD|Low: $6,855 AUD|High: $9,881 AUD|Avg: $8,182 AUD|-4.9%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2$6,855 AUD
Retailer 4$7,664 AUD
Retailer 5$8,001 AUD
Retailer 3$8,241 AUD
Retailer 6$8,262 AUD
Retailer 7$8,427 AUD
Blue Nile$9,397 AUD

45 data points across 7 retailers

8 retailers$6,855 AUD to $9,397 AUD

A
Cheapest Retailer
-
$6,855 AUD
A
Retailer 2
-
$7,664 AUD
View
A
Retailer 3
-
$8,001 AUD
View
A
Retailer 4
-
$8,241 AUD
View
B+
Retailer 5
-
$8,262 AUD
View
Final sale: no returns
A
Retailer 6
-
$8,427 AUD
View
B+
Retailer 7
-
$8,707 AUD
View
Most Expensive
B+
Blue Nile
29519225 · Nov 5
$9,397 AUD
$6,578 USD
View
7 more retailers have this diamond
Prices start from $6,855 AUDSave up to $2,541 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
1.51ct Round
$6,855 AUD