25mm Mirror Back Acrylic Buttons
In the right light they sparkle.
They are not cut glass quality but are a fraction of the price.
Please look at the image to get a better understanding of the quality.
They are quite large so please check the size is suitable before buying.
I would say they could be used for jackets, handmade knitwear, bags, belts (as decoration) etc..
The more you buy the cheaper it will work out per item.