Radiant|Natural|GIA

1.50ct I SI1 Radiant Natural Diamond

GD • I/SI1 • GIA 2507747553

Certificate GIA 2507747553

Diamond specifications and retailer prices

From £4,859 GBP
$6,510 USD
As of October 28, 2026
Save £5,620 GBP (54%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £10,478 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 2507747553. Listed at 19 retailers as of October 28, 2026, with prices from £4,859 to £10,478, a £5,620 spread on the same certified stone. NZ Jewellers lists it at £10,478. 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
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2507747553
Dimensions8.11 × 5.77 × 3.98 mm
L/W Ratio1.41
Top View
8.11 mm5.77 mm1.50 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2507747553
Side View
Table 64.0%CrownGirdle: ThickPavilionCulet: NoneDepth 68.9%

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 28
Current: £10,478 GBP|Low: £4,859 GBP|High: £10,478 GBP|Avg: £6,577 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 8£4,859 GBP
Retailer 3£5,239 GBP
Retailer 11£5,239 GBP
Retailer 10£5,676 GBP
Retailer 9£5,763 GBP
Retailer 2£5,914 GBP
Retailer 7£6,009 GBP
Retailer 6£6,460 GBP
Retailer 5£7,697 GBP
Retailer 4£8,731 GBP
NZ Jewellers£10,478 GBP

45 data points across 11 retailers

19 retailers£4,859 GBP to £10,478 GBP

B+
Cheapest Retailer
-
£4,859 GBP
$6,510 USD
B+
Retailer 2
-
£4,950 GBP
$6,633 USD
View
B
Retailer 3
-
£5,239 GBP
$7,020 USD
View
B
Retailer 4
-
£5,239 GBP
$7,020 USD
View
B
Retailer 5
-
£5,283 GBP
$7,079 USD
View
B
Retailer 6
-
£5,676 GBP
$7,605 USD
View
B
Retailer 7
-
£5,763 GBP
$7,722 USD
View
B
Retailer 8
-
£5,914 GBP
View
Retailer 9
-
£6,009 GBP
A$12,386 AUD
View
Price last confirmed 11 days ago
B
Retailer 10
-
£6,210 GBP
$8,321 USD
View
B
Retailer 11
-
£6,262 GBP
$8,390 USD
View
B
Retailer 12
-
£6,262 GBP
$8,390 USD
View
B
Retailer 13
-
£6,310 GBP
$8,454 USD
View
B
Retailer 14
-
£6,460 GBP
€8,243 EUR
View
B
Retailer 15
-
£6,471 GBP
$8,670 USD
View
B
Retailer 16
-
£6,549 GBP
$8,775 USD
View
B
Retailer 17
-
£7,697 GBP
ZAR 166,605 ZAR
View
B
Retailer 18
-
£8,731 GBP
View
Most Expensive
C
NZ Jewellers
d28598f7-8273-41f0-a3c3-53f2e777a7d0 · Oct 30
£10,478 GBP
$14,040 USD
View
18 more retailers have this diamond
Prices start from £4,859 GBPSave up to £5,620 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
£4,859 GBP