Radiant|Natural|GIA

1.50ct K SI1 Radiant Natural Diamond

EX • K/SI1 • GIA 6542466536

Certificate GIA 6542466536

Diamond specifications and retailer prices

From £1,616 GBP
As of November 6, 2026
Save £2,106 GBP (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £4,486 GBP at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.5ct natural radiant diamond

This 1.5ct natural radiant sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542466536. Listed at 18 retailers as of November 4, 2026, with a 130% 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6542466536
Dimensions7.68 × 5.72 × 3.86 mm
L/W Ratio1.34
Top View
7.68 mm5.72 mm1.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6542466536
Side View
Table 68.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 67.6%

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 6
Current: £2,021 GBP|Low: £1,616 GBP|High: £3,771 GBP|Avg: £2,361 GBP|-3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 2£1,616 GBP
Retailer 4£1,726 GBP
Retailer 9£1,903 GBP
Retailer 1£2,021 GBP
Retailer 5£2,067 GBP
Retailer 6£2,252 GBP
Retailer 3£2,255 GBP
Retailer 7£2,480 GBP
Retailer 8£2,600 GBP
Retailer 10£3,722 GBP

25 data points across 10 retailers

18 retailers£1,616 GBP to £3,722 GBP

A
Cheapest Retailer
-
£1,616 GBP
A
Retailer 2
-
£1,726 GBP
View
A
Retailer 3
-
£1,903 GBP
View
A
Retailer 4
-
£2,021 GBP
View
A
Retailer 5
-
£2,021 GBP
View
A
Retailer 6
-
£2,067 GBP
View
Retailer 7
-
£2,146 GBP
View
Price last confirmed 30 days ago
Retailer 8
-
£2,146 GBP
View
Price last confirmed 30 days ago
A
Retailer 9
-
£2,150 GBP
View
Retailer 10
-
£2,229 GBP
View
Price last confirmed 38 days ago
A
Retailer 11
-
£2,235 GBP
View
A
Retailer 12
-
£2,252 GBP
View
A
Retailer 13
-
£2,255 GBP
View
Retailer 14
-
£2,476 GBP
View
Price last confirmed 29 days ago
A
Retailer 15
-
£2,480 GBP
View
A
Retailer 16
-
£2,600 GBP
View
B
Retailer 17
-
£3,722 GBP
View
Most Expensive
NZ Jewellers
26738c81-d90b-4ff3-af35-ecd2c1c77dc9 · Sep 30
£4,486 GBP
$6,005 USD
View
Price last confirmed 37 days ago
17 more retailers have this diamond
Prices start from £1,616 GBPSave up to £2,106 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 Radiant
£1,616 GBP