Diamonds and rust

My new Fitbit buzzes me every hour to tell me to get off my butt to walk 250 steps! So I've been walking up and down the garden of the house am sitting and to spice things up I walk up and down my aunt and uncles place too!(exciting life I lead!!!)
My uncle had a series of sheds/ workshops where he messes with things - including traction engines and related fiddlings. He also makes puzzle games out of wood and metal. I am assuming these are some of the metal shavings from such endeavours. They kept catching my eye so decided to blip them. Was fascinated by the rust on some and not others as well as all the patterns and swirls they make