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Round|Natural|GIA

1.50ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 5403991543

Certificate GIA 5403991543

Diamond specifications and retailer prices

From £2,382 GBP
As of November 4, 2026
Save £3,202 GBP (57%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £5,686 GBP at NZ Jewellers · As of September 10, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5403991543. Listed at 23 retailers as of November 4, 2026, with a 134% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.50
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 5403991543
Dimensions7.31 × 7.25 × 4.56 mm
L/W Ratio1.01
Top View
7.31 mm7.25 mm1.50 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5403991543
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.6%

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 4
Current: £5,584 GBP|Low: £2,145 GBP|High: £5,686 GBP|Avg: £3,530 GBP|-1.8%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 6, 2026
Retailer 14£2,382 GBP
Retailer 6£2,463 GBP
Retailer 4£2,464 GBP
Retailer 7£2,504 GBP
Retailer 8£2,528 GBP
Retailer 5£2,555 GBP
Retailer 16£2,898 GBP
Retailer 3£2,904 GBP
Retailer 17£2,904 GBP
Retailer 19£2,904 GBP
Retailer 9£3,100 GBP
Retailer 18£3,160 GBP
Retailer 2£3,207 GBP
Retailer 10£3,350 GBP
Retailer 13£3,387 GBP
Retailer 12£3,623 GBP
Retailer 11£4,634 GBP
Retailer 15£5,104 GBP
NZ Jewellers£5,584 GBP

43 data points across 19 retailers

23 retailers£2,382 GBP to £5,584 GBP

A
Cheapest Retailer
-
£2,382 GBP
A
Retailer 2
-
£2,463 GBP
View
A
Retailer 3
-
£2,464 GBP
View
A
Retailer 4
-
£2,504 GBP
View
A
Retailer 5
-
£2,528 GBP
View
A
Retailer 6
-
£2,555 GBP
View
B+
Retailer 7
-
£2,898 GBP
View
B+
Retailer 8
-
£2,904 GBP
View
Retailer 9
-
£2,904 GBP
View
Price last confirmed 8 days ago
B+
Retailer 10
-
£2,904 GBP
View
Retailer 11
-
£2,957 GBP
View
Price last confirmed 56 days ago
Retailer 12
-
£3,017 GBP
View
Price last confirmed 14 days ago
B+
Retailer 13
-
£3,100 GBP
View
B+
Retailer 14
-
£3,160 GBP
View
B+
Retailer 15
-
£3,207 GBP
View
B+
Retailer 16
-
£3,350 GBP
View
B+
Retailer 17
-
£3,387 GBP
View
Retailer 18
-
£3,412 GBP
View
Price last confirmed 60 days ago
B+
Retailer 19
-
£3,623 GBP
View
B
Retailer 20
-
£4,634 GBP
View
B
Retailer 21
-
£5,104 GBP
View
B
Retailer 22
-
£5,584 GBP
View
Most Expensive
NZ Jewellers
b87281be-c421-4565-b3fd-f27d96f175c9 · Sep 10
£5,686 GBP
$7,653 USD
View
Price last confirmed 56 days ago
22 more retailers have this diamond
Prices start from £2,382 GBPSave up to £3,202 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
£2,382 GBP