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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 £3,566 GBP
As of November 6, 2026
Save £1,322 GBP (27%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £4,887 GBP 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 £3,566 to £4,887, a £1,322 spread on the same certified stone. Blue Nile lists it at £4,887. 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £4,887 GBP|Low: £3,566 GBP|High: £5,139 GBP|Avg: £4,256 GBP|-4.9%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2£3,566 GBP
Retailer 4£3,986 GBP
Retailer 5£4,161 GBP
Retailer 3£4,286 GBP
Retailer 6£4,297 GBP
Retailer 7£4,383 GBP
Blue Nile£4,887 GBP

45 data points across 7 retailers

8 retailers£3,566 GBP to £4,887 GBP

A
Cheapest Retailer
-
£3,566 GBP
A
Retailer 2
-
£3,986 GBP
View
A
Retailer 3
-
£4,161 GBP
View
A
Retailer 4
-
£4,286 GBP
View
B+
Retailer 5
-
£4,297 GBP
View
Final sale: no returns
A
Retailer 6
-
£4,383 GBP
View
B+
Retailer 7
-
£4,529 GBP
View
Most Expensive
B+
Blue Nile
29519225 · Nov 5
£4,887 GBP
$6,578 USD
View
7 more retailers have this diamond
Prices start from £3,566 GBPSave up to £1,322 GBP

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
£3,566 GBP