Hi can anyone help identify this rock

https://preview.redd.it/mpve9hkl3v1d1.jpg?width=2268&format=pjpg&auto=webp&s=1a20b04621a345740bc59751a9ab8fbde9abee80

https://preview.redd.it/8kidoh5n3v1d1.jpg?width=2268&format=pjpg&auto=webp&s=ecc2f465dd8269555b9c4d09c3c4a74915b79c1e

https://preview.redd.it/goqzln0r3v1d1.jpg?width=2268&format=pjpg&auto=webp&s=a0861d347cc30e467798e38217f2d7df7858bc31

I found this on the Irish coast in Co Waterford, I think it might be quartz.