Radiant|Natural|GIA

1.50ct I SI1 Radiant Natural Diamond

GD • I/SI1 • GIA 1159967716

Certificate GIA 1159967716

Diamond specifications and retailer prices

From £3,579 GBP
$4,795 USD
As of October 31, 2026
Save £4,380 GBP (55%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: £7,959 GBP at NZ Jewellers · As of October 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1159967716. Listed at 26 retailers as of October 30, 2026, with prices from £3,579 to £7,959, a £4,380 spread on the same certified stone. NZ Jewellers lists it at £7,959. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.50
Carat
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1159967716
Dimensions7.23 × 5.84 × 3.89 mm
L/W Ratio1.24
Culet sizeNone
Top View
7.23 mm5.84 mm1.50 ctI / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceStrong
CertificateGIA 1159967716
Side View
Table 69.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 66.6%

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: Oct 31
Current: £5,199 GBP|Low: £3,448 GBP|High: £7,096 GBP|Avg: £4,569 GBP|+2.6%
Retailer 1
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 2, 2026
Retailer 3£3,579 GBP
Retailer 9£3,780 GBP
Retailer 11£3,793 GBP
Retailer 4£4,026 GBP
Retailer 5£4,122 GBP
Retailer 2£4,311 GBP
Retailer 12£4,311 GBP
Retailer 13£4,388 GBP
Retailer 6£4,565 GBP
Retailer 10£4,704 GBP
Retailer 1£5,199 GBP
Retailer 8£5,847 GBP
Retailer 7£7,011 GBP

44 data points across 13 retailers

26 retailers£3,579 GBP to £7,959 GBP

B+
Cheapest Retailer
-
£3,579 GBP
$4,795 USD
B+
Retailer 2
-
£3,717 GBP
$4,981 USD
View
B+
Retailer 3
-
£3,760 GBP
$5,038 USD
View
B+
Retailer 4
-
£3,780 GBP
$5,065 USD
View
B+
Retailer 5
-
£3,793 GBP
$5,082 USD
View
Final sale: no returns
B+
Retailer 6
-
£3,809 GBP
$5,103 USD
View
B+
Retailer 7
-
£3,913 GBP
A$8,067 AUD
View
B+
Retailer 8
-
£4,013 GBP
CA$7,468 CAD
View
B+
Retailer 9
-
£4,026 GBP
$5,395 USD
View
B+
Retailer 10
-
£4,122 GBP
$5,523 USD
View
B+
Retailer 11
-
£4,311 GBP
$5,776 USD
View
B+
Retailer 12
-
£4,311 GBP
$5,776 USD
View
B+
Retailer 13
-
£4,311 GBP
$5,776 USD
View
B+
Retailer 14
-
£4,388 GBP
$5,880 USD
View
B
Retailer 15
-
£4,545 GBP
$6,090 USD
View
B+
Retailer 16
-
£4,565 GBP
View
Retailer 17
-
£4,704 GBP
A$9,697 AUD
View
Price last confirmed 22 days ago
B
Retailer 18
-
£4,974 GBP
$6,665 USD
View
B
Retailer 19
-
£5,199 GBP
€6,634 EUR
View
Retailer 20
-
£5,247 GBP
$7,031 USD
View
Price last confirmed 10 days ago
B
Retailer 21
-
£5,391 GBP
$7,224 USD
View
B
Retailer 22
-
£5,670 GBP
A$11,688 AUD
View
B
Retailer 23
-
£5,847 GBP
ZAR 126,559 ZAR
View
C
Retailer 24
-
£6,896 GBP
$9,240 USD
View
B
Retailer 25
-
£7,011 GBP
View
Most Expensive
C
NZ Jewellers
0af57ebc-7dca-4e67-8155-bef61d7e7a1b · Oct 30
£7,959 GBP
$10,664 USD
View
25 more retailers have this diamond
Prices start from £3,579 GBPSave up to £4,380 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 Radiant
£3,579 GBP