Convoluted sheet quartz is a quartz that has grown around another stone and with time the other stone has eroded away, leaving spaces in the quartz where the stone once was.
In these stones, the eroded mineral was diopside.
This is a stone that is particularly suited to dealing with loss. You can see the holes and indentations left by the eroded diopside. In a similar way there can be a hole left within you when someone you come to love is no longer there.
This is a stone that helps to deal with the loss and grief for those who are no longer in our lives.