Round|Natural|GIA

1.51ct K IF Round Natural Diamond

EX • K/IF • GIA 6555600975

Certificate GIA 6555600975

Diamond specifications and retailer prices

From $4,799 USD
As of November 6, 2026
Save $1,779 USD (27%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $6,578 USD 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 $4,799 to $6,578, a $1,779 spread on the same certified stone. Blue Nile lists it at $6,578. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $6,578 USD|Low: $4,799 USD|High: $6,917 USD|Avg: $5,728 USD|-4.9%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2$4,799 USD
Retailer 4$5,365 USD
Retailer 5$5,601 USD
Retailer 3$5,769 USD
Retailer 6$5,784 USD
Retailer 7$5,899 USD
Blue Nile$6,578 USD

45 data points across 7 retailers

8 retailers$4,799 USD to $6,578 USD

A
Cheapest Retailer
-
$4,799 USD
A
Retailer 2
-
$5,365 USD
View
A
Retailer 3
-
$5,601 USD
View
A
Retailer 4
-
$5,769 USD
View
B+
Retailer 5
-
$5,784 USD
View
Final sale: no returns
A
Retailer 6
-
$5,899 USD
View
B+
Retailer 7
-
$6,095 USD
View
Most Expensive
B+
Blue Nile
29519225 · Nov 5
$6,578 USD
View
7 more retailers have this diamond
Prices start from $4,799 USDSave up to $1,779 USD

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
$4,799 USD