I read this book series as a kid back in the late 1970s, so it's an old series - and my memories are similarly old, and vague.
I know it's a fantasy series. I think there are 4 books in the series. Or perhaps 7.
There's a central boy character who has to get a collection of magical objects (every fantasy needs a quest!), each of which represents a different magical 'element': wood, stone, fire, etc. I definitely remember there was a wooden object. He lives in our normal world. The whole series takes place "here & now". I have a feeling he's a "chosen" person of some kind... But, the strongest memory I have is of a symbol: a circle which is divided into quarters (a vertical bar and a horizontal bar).
I know it's vague, but does anyone recognise this?