alum for growing crystals - where to buy?

[mimsum]

Dd is very keen to grow her own crystals and has a book with lots of experiments in it - it says she needs to have alum but I can't find it anywhere - I've googled with limited success - does anyone have any ideas please?

thanks

I would have thought an ordinary high street chemists would have some (probably an independant rather than somewhere like Boots)

Message withdrawn

Chemist. Get some copper sulphate too and do lovely blue ones.

thanks - I'll try another chemist - our local one didn't have any and thanks BZ for tip about copper sulphate