Nothing to worry about. It looks like vermiculite which is a component of some potting soils. It's a mineral agent that helps aerate the soil and allows the plant to breathe & water to penetrate down to the root zone.

They are actually slow-release fertiliser capsules and have been confusing gardeners for decades. Squeeze one between your fingers and you should find that it will now crush like a small, dry eggshell.

Thank you Bathgate and Bulbaholic...was very worried !

You aren't alone Teddygirl - somebody asks this every year.

Thanks Steragram x

;})