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Nepheline Syenite

Valentine Clays Ltd

£24.45

Nepheline Syenite is a lower temperature flux with a more fusible and vigorous fluxing action than Feldspar. It has lower silica and higher soda and potassium levels, so may be used when a lower melting temperature is required. It has a fairly narrow vitrification band typically used in vitreous bodies. Nepheline Syenite is like Feldspar on steroids - with a touch of iron, it may not be as bright as potash or soda, but its melting and flux capabilities are amplified.

Valentine Clays Ltd's own words, read from their page.

Buy from Valentine Clays LtdPrice seen 2026-09-05. Affiliate link.

Where this comes from

The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.

UK company
Registered at Companies House as VALENTINE CLAYS LTD, number 04610423. Checked 2026-08-29.
Means the business is a British legal entity, not a British-sounding name owned elsewhere. It says nothing about where anything is made.
UK operations
Not yet checked.
Means people employed here, or premises they actually work from. We keep this separate from the company badge because a registered office can be an accountant's spare room, and a company can be registered in Britain while everything it does happens somewhere else. Where we have not looked, we say so rather than assuming.
British-owned
No majority shareholding traced outside the UK. Companies House.
Read from the register of people with significant control, following the chain of holding companies. It does not gate anything: a firm can be made here and owned elsewhere, and that is worth telling you rather than hiding.
Where it is made
The maker doesn't say, so neither do we.
This is about the individual product, not the company. A British firm can sell things made abroad, which is normal and not a criticism. We would rather tell you which is which than average them into a score.