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Round|Natural|GIA

1.51ct K I1 Round Natural Diamond

EX • K/I1 • GIA 1515161633

Certificate GIA 1515161633

Diamond specifications and retailer prices

From £2,244 GBP
As of November 6, 2026
Save £3,017 GBP (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £5,260 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 1515161633. Listed at 8 retailers as of November 5, 2026, with prices from £2,244 to £5,260, a £3,017 spread on the same certified stone. NZ Jewellers lists it at £5,260. 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
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1515161633
Dimensions7.27 × 7.31 × 4.56 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Crystal, Needle
Top View
7.27 mm7.31 mm1.51 ctK / I1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1515161633
Side View
Table 58.0%Crown 35.5°Girdle: Slightly ThickPavilion 41.2°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £5,260 GBP|Low: £1,549 GBP|High: £5,260 GBP|Avg: £2,990 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 5£1,549 GBP
Retailer 4£1,643 GBP
Retailer 6£2,244 GBP
Retailer 7£2,428 GBP
Retailer 9£2,736 GBP
Retailer 11£2,736 GBP
Retailer 8£2,840 GBP
Retailer 3£2,888 GBP
Retailer 10£3,156 GBP
Retailer 2£3,390 GBP
Retailer 12£3,592 GBP
Retailer 13£4,275 GBP
NZ Jewellers£5,260 GBP

20 data points across 13 retailers

8 retailers£2,244 GBP to £5,260 GBP

B+
Cheapest Retailer
-
£2,244 GBP
B+
Retailer 2
-
£2,428 GBP
View
B+
Retailer 3
-
£2,736 GBP
View
Retailer 4
-
£2,736 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£2,840 GBP
View
B
Retailer 6
-
£3,156 GBP
View
B
Retailer 7
-
£3,390 GBP
View
Most Expensive
C
NZ Jewellers
31a47f8d-1050-4502-8e5a-31aca8388e9a · Nov 5
£5,260 GBP
$7,080 USD
View
7 more retailers have this diamond
Prices start from £2,244 GBPSave up to £3,017 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.

B+
1.51ct Round
£2,244 GBP