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Round|Natural|GIA

1.50ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 6233939765

Certificate GIA 6233939765

Diamond specifications and retailer prices

From £4,353 GBP
As of November 6, 2026
Save £5,442 GBP (56%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: £9,795 GBP at NZ Jewellers · As of November 5, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6233939765. Listed at 26 retailers as of November 5, 2026, with prices from £4,353 to £9,795, a £5,442 spread on the same certified stone. NZ Jewellers lists it at £9,795. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6233939765
Dimensions7.22 × 7.28 × 4.47 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
7.22 mm7.28 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6233939765
Side View
Table 61.0%Crown 35.5°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 61.7%

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: £5,990 GBP|Low: £4,247 GBP|High: £8,204 GBP|Avg: £5,873 GBP|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8£4,353 GBP
Retailer 7£4,672 GBP
Retailer 2£5,397 GBP
Retailer 6£5,646 GBP
Retailer 1£5,990 GBP
Retailer 4£6,000 GBP
Retailer 3£7,145 GBP
Retailer 5£8,139 GBP

44 data points across 8 retailers

26 retailers£4,353 GBP to £9,795 GBP

B+
Cheapest Retailer
-
£4,353 GBP
B+
Retailer 2
-
£4,420 GBP
View
B+
Retailer 3
-
£4,626 GBP
View
B+
Retailer 4
-
£4,672 GBP
View
Final sale: no returns
B+
Retailer 5
-
£4,690 GBP
View
B+
Retailer 6
-
£4,864 GBP
View
Retailer 7
-
£4,897 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£4,912 GBP
View
B+
Retailer 9
-
£5,214 GBP
View
B+
Retailer 10
-
£5,305 GBP
View
B+
Retailer 11
-
£5,397 GBP
View
B
Retailer 12
-
£5,405 GBP
View
B
Retailer 13
-
£5,598 GBP
View
Retailer 14
-
£5,646 GBP
View
Price last confirmed 15 days ago
B+
Retailer 15
-
£5,872 GBP
View
B+
Retailer 16
-
£5,872 GBP
View
B+
Retailer 17
-
£5,903 GBP
View
B+
Retailer 18
-
£5,990 GBP
View
B+
Retailer 19
-
£6,000 GBP
View
B
Retailer 20
-
£6,067 GBP
View
B
Retailer 21
-
£6,121 GBP
View
B
Retailer 22
-
£6,448 GBP
View
Retailer 23
-
£6,452 GBP
View
Price last confirmed 14 days ago
B
Retailer 24
-
£7,145 GBP
View
B
Retailer 25
-
£8,139 GBP
View
Most Expensive
B
NZ Jewellers
88894d16-2cac-4304-82c2-a7849fbcd248 · Nov 5
£9,795 GBP
$13,110 USD
View
25 more retailers have this diamond
Prices start from £4,353 GBPSave up to £5,442 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+
1.50ct Round
£4,353 GBP