Radiant|Natural|GIA

1.50ct J SI1 Radiant Natural Diamond

GD • J/SI1 • GIA 1408479256

Certificate GIA 1408479256

Diamond specifications and retailer prices

From £1,752 GBP
As of November 4, 2026
Save £1,944 GBP (53%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £4,634 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 J 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 1408479256. Listed at 23 retailers as of November 4, 2026, with a 111% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
J
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1408479256
Dimensions7.13 × 5.42 × 3.91 mm
L/W Ratio1.32
Culet sizeNone
Top View
7.13 mm5.42 mm1.50 ctJ / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 1408479256
Side View
Table 58.0%CrownGirdle: Extremely ThickPavilionCulet: NoneDepth 72.2%

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 4
Current: £2,347 GBP|Low: £1,752 GBP|High: £3,751 GBP|Avg: £2,460 GBP|+0.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 6£1,752 GBP
Retailer 7£1,854 GBP
Retailer 2£2,101 GBP
Retailer 1£2,347 GBP
Retailer 8£2,492 GBP
Retailer 3£2,555 GBP
Retailer 4£2,705 GBP
Retailer 5£3,696 GBP

38 data points across 8 retailers

23 retailers£1,752 GBP to £3,696 GBP

B+
Cheapest Retailer
-
£1,752 GBP
B+
Retailer 2
-
£1,798 GBP
View
B+
Retailer 3
-
£1,854 GBP
View
Final sale: no returns
B+
Retailer 4
-
£1,875 GBP
View
B+
Retailer 5
-
£1,980 GBP
View
Retailer 6
-
£2,008 GBP
View
Price last confirmed 37 days ago
B+
Retailer 7
-
£2,035 GBP
View
B+
Retailer 8
-
£2,040 GBP
View
Retailer 9
-
£2,085 GBP
View
Price last confirmed 38 days ago
B+
Retailer 10
-
£2,101 GBP
View
B+
Retailer 11
-
£2,161 GBP
View
B+
Retailer 12
-
£2,294 GBP
View
B+
Retailer 13
-
£2,294 GBP
View
Retailer 14
-
£2,317 GBP
View
Price last confirmed 67 days ago
Retailer 15
-
£2,317 GBP
View
Price last confirmed 39 days ago
B+
Retailer 16
-
£2,347 GBP
View
B+
Retailer 17
-
£2,368 GBP
View
Retailer 18
-
£2,492 GBP
View
Price last confirmed 34 days ago
B+
Retailer 19
-
£2,555 GBP
View
Retailer 20
-
£2,573 GBP
View
Price last confirmed 15 days ago
B+
Retailer 21
-
£2,705 GBP
View
B
Retailer 22
-
£3,696 GBP
View
Most Expensive
NZ Jewellers
5e19215d-1df8-4705-b2d1-ae11bffc1d6e · Sep 30
£4,634 GBP
$6,203 USD
View
Price last confirmed 37 days ago
22 more retailers have this diamond
Prices start from £1,752 GBPSave up to £1,944 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
£1,752 GBP