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Round|Natural|GIA

1.50ct K I1 Round Natural Diamond

EX • K/I1 • GIA 6421510450

Certificate GIA 6421510450

Diamond specifications and retailer prices

From £1,693 GBP
As of November 6, 2026
Save £954 GBP (36%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £3,970 GBP at NZ Jewellers · As of October 23, 2026
View at NZ Jewellers

About this 1.5ct natural round diamond

This 1.5ct 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 6421510450. Listed at 8 retailers as of November 5, 2026, with a 56% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.50
Carat
K
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
Crown angle31.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6421510450
Dimensions7.36 × 7.42 × 4.50 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
7.36 mm7.42 mm1.50 ctK / I1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6421510450
Side View
Table 57.0%Crown 31.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 60.9%

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: £3,970 GBP|Low: £1,673 GBP|High: £4,068 GBP|Avg: £2,515 GBP|-2.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 4£1,693 GBP
Retailer 5£2,040 GBP
Retailer 10£2,129 GBP
Retailer 6£2,279 GBP
Retailer 7£2,279 GBP
Retailer 9£2,366 GBP
Retailer 8£2,629 GBP
Retailer 2£2,647 GBP
Retailer 3£2,685 GBP
Retailer 11£2,792 GBP
NZ Jewellers£3,970 GBP

31 data points across 11 retailers

8 retailers£1,693 GBP to £2,647 GBP

A
Cheapest Retailer
-
£1,693 GBP
B+
Retailer 2
-
£2,040 GBP
View
Retailer 3
-
£2,279 GBP
View
Price last confirmed 11 days ago
Retailer 4
-
£2,279 GBP
View
Price last confirmed 12 days ago
Retailer 5
-
£2,366 GBP
View
Price last confirmed 12 days ago
Retailer 6
-
£2,629 GBP
View
Price last confirmed 14 days ago
B+
Retailer 7
-
£2,647 GBP
View
Most Expensive
NZ Jewellers
d8bdc495-5cf7-45e5-8e69-a2c0a60250f1 · Oct 23
£3,970 GBP
$5,343 USD
View
Price last confirmed 13 days ago
7 more retailers have this diamond
Prices start from £1,693 GBPSave up to £954 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
1.50ct Round
£1,693 GBP