Round|Natural|GIA

1.50ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1535711463

Certificate GIA 1535711463

Diamond specifications and retailer prices

From £2,350 GBP
As of November 4, 2026
Save £2,930 GBP (55%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £5,501 GBP at NZ Jewellers · As of October 20, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1535711463. Listed at 18 retailers as of November 2, 2026, with a 125% 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

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1535711463
Dimensions7.32 × 7.29 × 4.49 mm
L/W Ratio1.00
Star length50%
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
7.32 mm7.29 mm1.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1535711463
Side View
Table 59.0%Crown 36°Girdle: Sli. ThickPavilion 40.6°Culet: NoneDepth 61.6%

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: £5,501 GBP|Low: £2,350 GBP|High: £5,501 GBP|Avg: £3,603 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 6, 2026
Retailer 4£2,350 GBP
Retailer 10£2,556 GBP
Retailer 12£2,646 GBP
Retailer 13£2,734 GBP
Retailer 3£2,970 GBP
Retailer 9£3,180 GBP
Retailer 2£3,439 GBP
Retailer 5£3,451 GBP
Retailer 8£3,546 GBP
Retailer 7£3,566 GBP
Retailer 6£3,854 GBP
Retailer 11£5,280 GBP
NZ Jewellers£5,501 GBP

36 data points across 13 retailers

18 retailers£2,350 GBP to £5,280 GBP

A
Cheapest Retailer
-
£2,350 GBP
A
Retailer 2
-
£2,540 GBP
View
A
Retailer 3
-
£2,556 GBP
View
B+
Retailer 4
-
£2,646 GBP
View
B+
Retailer 5
-
£2,734 GBP
View
Retailer 6
-
£2,861 GBP
View
Price last confirmed 15 days ago
Retailer 7
-
£2,861 GBP
View
Price last confirmed 21 days ago
Retailer 8
-
£2,970 GBP
View
Price last confirmed 15 days ago
B+
Retailer 9
-
£3,180 GBP
View
Retailer 10
-
£3,301 GBP
View
Price last confirmed 16 days ago
B+
Retailer 11
-
£3,439 GBP
View
B+
Retailer 12
-
£3,451 GBP
View
B+
Retailer 13
-
£3,546 GBP
View
B+
Retailer 14
-
£3,566 GBP
View
Retailer 15
-
£3,572 GBP
View
Price last confirmed 14 days ago
B
Retailer 16
-
£3,854 GBP
View
B
Retailer 17
-
£5,280 GBP
View
Most Expensive
NZ Jewellers
33a4f54c-80f2-41f5-a39c-395b47ca8e26 · Oct 20
£5,501 GBP
$7,404 USD
View
Price last confirmed 16 days ago
17 more retailers have this diamond
Prices start from £2,350 GBPSave up to £2,930 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
£2,350 GBP