Amethyst goggles for swimming

I think it would be great to have a swimming amethyst goggles, to get a clear view underwater. NOK it's like, if you're out of the water you can look very far through it, but when you're in it, it's difficult to see something. Maybe the screen gets a purple, violett touch. You can craft this goggle wit three sticks (to upper left and right corner, one in the middle) and two amethyst crystals (middle left and right). I hope you like my idea. I would be glad if this new item would be in one of the next updates.