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Radiant|Natural|GIA

1.50ct H SI1 Radiant Natural Diamond

EX • H/SI1 • GIA 2557139819

Certificate GIA 2557139819

Diamond specifications and retailer prices

From £2,560 GBP
HK$26,800 HKD
As of November 1, 2026
Save £2,917 GBP (53%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £6,504 GBP at NZ Jewellers · As of September 29, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557139819. Listed at 20 retailers as of November 1, 2026, with a 114% 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2557139819
Dimensions7.30 × 5.60 × 3.92 mm
L/W Ratio1.30
Top View
7.30 mm5.60 mm1.50 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2557139819
Side View
Table 67.0%CrownGirdle: ThickPavilionCulet: NoneDepth 69.9%

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 1
Current: £4,441 GBP|Low: £2,560 GBP|High: £5,756 GBP|Avg: £3,599 GBP|-2.1%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 19£2,560 GBP
Retailer 16£2,742 GBP
Retailer 14£2,920 GBP
Retailer 10£2,931 GBP
Retailer 3£2,946 GBP
Retailer 6£3,004 GBP
Retailer 17£3,074 GBP
Retailer 8£3,102 GBP
Retailer 12£3,122 GBP
Retailer 5£3,144 GBP
Retailer 18£3,194 GBP
Retailer 15£3,277 GBP
Retailer 7£3,348 GBP
Retailer 11£3,760 GBP
Retailer 13£3,950 GBP
Retailer 4£4,292 GBP
Retailer 1£4,441 GBP
Retailer 9£5,459 GBP
Retailer 2£5,478 GBP

24 data points across 19 retailers

20 retailers£2,560 GBP to £5,478 GBP

A
Cheapest Retailer
-
£2,560 GBP
HK$26,800 HKD
A
Retailer 2
-
£2,742 GBP
$3,674 USD
View
A
Retailer 3
-
£2,920 GBP
$3,912 USD
View
Final sale: no returns
A
Retailer 4
-
£2,931 GBP
$3,927 USD
View
A
Retailer 5
-
£2,946 GBP
€3,760 EUR
View
A
Retailer 6
-
£3,004 GBP
$4,025 USD
View
A
Retailer 7
-
£3,074 GBP
A$6,338 AUD
View
A
Retailer 8
-
£3,102 GBP
$4,157 USD
View
A
Retailer 9
-
£3,122 GBP
$4,183 USD
View
A
Retailer 10
-
£3,144 GBP
$4,212 USD
View
A
Retailer 11
-
£3,194 GBP
$4,280 USD
View
A
Retailer 12
-
£3,277 GBP
View
A
Retailer 13
-
£3,348 GBP
$4,486 USD
View
Retailer 14
-
£3,760 GBP
A$7,750 AUD
View
Price last confirmed 23 days ago
A
Retailer 15
-
£3,950 GBP
€5,041 EUR
View
B+
Retailer 16
-
£4,292 GBP
ZAR 92,900 ZAR
View
B+
Retailer 17
-
£4,441 GBP
$5,950 USD
View
Retailer 18
-
£5,459 GBP
$7,314 USD
View
Price last confirmed 9 days ago
B
Retailer 19
-
£5,478 GBP
View
Most Expensive
NZ Jewellers
b734cccf-65a5-4d93-bb26-173a12bb62c9 · Sep 29
£6,504 GBP
$8,715 USD
View
Price last confirmed 33 days ago
19 more retailers have this diamond
Prices start from £2,560 GBPSave up to £2,917 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 Radiant
£2,560 GBP