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Round|Natural|GIA

1.51ct K I1 Round Natural Diamond

EX • K/I1 • GIA 6422460858

Certificate GIA 6422460858

Diamond specifications and retailer prices

From £2,178 GBP
As of November 6, 2026
Save £2,912 GBP (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £5,089 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

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 I1 clarity (included), with a top-tier cut grade and certified by GIA 6422460858. Listed at 8 retailers as of November 5, 2026, with prices from £2,178 to £5,089, a £2,912 spread on the same certified stone. NZ Jewellers lists it at £5,089. 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
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6422460858
Dimensions7.33 × 7.30 × 4.57 mm
L/W Ratio1.00
Top View
7.33 mm7.30 mm1.51 ctK / I1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6422460858
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.5%

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: £5,089 GBP|Low: £2,158 GBP|High: £5,089 GBP|Avg: £3,007 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 5, 2026
Retailer 7£2,178 GBP
Retailer 6£2,277 GBP
Retailer 3£2,349 GBP
Retailer 12£2,377 GBP
Retailer 9£2,647 GBP
Retailer 11£2,647 GBP
Retailer 8£2,748 GBP
Retailer 5£2,790 GBP
Retailer 10£3,054 GBP
Retailer 2£3,280 GBP
Retailer 13£3,476 GBP
Retailer 4£4,131 GBP
NZ Jewellers£5,089 GBP

24 data points across 13 retailers

8 retailers£2,178 GBP to £5,089 GBP

B+
Cheapest Retailer
-
£2,178 GBP
A
Retailer 2
-
£2,277 GBP
View
Retailer 3
-
£2,647 GBP
View
Price last confirmed 8 days ago
B+
Retailer 4
-
£2,647 GBP
View
B+
Retailer 5
-
£2,748 GBP
View
B
Retailer 6
-
£3,054 GBP
View
B
Retailer 7
-
£3,280 GBP
View
Most Expensive
C
NZ Jewellers
56c14851-5019-4e7f-a5c6-c9a71134b5aa · Nov 5
£5,089 GBP
$6,850 USD
View
7 more retailers have this diamond
Prices start from £2,178 GBPSave up to £2,912 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
£2,178 GBP