Radiant|Natural|GIA

1.50ct K SI1 Radiant Natural Diamond

EX • K/SI1 • GIA 2506294196

Certificate GIA 2506294196

Diamond specifications and retailer prices

From £1,636 GBP
As of November 2, 2026
Save £1,303 GBP (44%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £3,641 GBP at NZ Jewellers · As of September 20, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2506294196. Listed at 9 retailers as of November 2, 2026, with a 80% 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle48.63°
Pavilion angle32.76°
OriginNatural
Grading LabGIA
CertificateGIA 2506294196
Dimensions7.31 × 5.69 × 3.96 mm
L/W Ratio1.28
Top View
7.31 mm5.69 mm1.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2506294196
Side View
Table 69.0%Crown 48.63°GirdlePavilion 32.76°CuletDepth 69.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £1,636 GBP|Low: £1,636 GBP|High: £3,088 GBP|Avg: £2,026 GBP|-1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 1£1,636 GBP
Retailer 3£1,685 GBP
Retailer 4£1,711 GBP
Retailer 7£1,951 GBP
Retailer 6£1,989 GBP
Retailer 5£2,059 GBP
Retailer 2£2,939 GBP

28 data points across 7 retailers

9 retailers£1,636 GBP to £2,939 GBP

A
Cheapest Retailer
-
£1,636 GBP
A
Retailer 2
-
£1,685 GBP
View
A
Retailer 3
-
£1,711 GBP
View
Retailer 4
-
£1,715 GBP
View
Price last confirmed 30 days ago
Retailer 5
-
£1,742 GBP
View
Price last confirmed 46 days ago
Retailer 6
-
£1,822 GBP
View
Price last confirmed 38 days ago
B+
Retailer 7
-
£2,939 GBP
View
Retailer 8
-
£3,585 GBP
View
Price last confirmed 35 days ago
Most Expensive
NZ Jewellers
28e0a51c-b182-4258-9cb4-63c50580162f · Sep 20
£3,641 GBP
$4,874 USD
View
Price last confirmed 47 days ago
8 more retailers have this diamond
Prices start from £1,636 GBPSave up to £1,303 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
£1,636 GBP