Answer:
Used on a diamond and left on a board. It's great for a gymnast his grip to restore. What is it?
It is able to speak because it has a hard gone. You know what it is as soon as it has sung. What is it?
In Paris but not in France, the thinnest of its siblings.
Sleeping during the day, I hide away. Watchful through the night, I open at dawn's light. But only for the briefest time, do I shine. And then I hide away. And sleep through the day.
It is a sound of empty, speak and it'll talk back plenty. But all the more you yack, you'll get the same words back.
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.