so 1.7 cm thickness

Yes, you can definitely do that. The stone has grooves on the lower side so that it can be optimally placed on the oven rack. Just pay attention to the dimensions: If your oven is big enough (I would really measure it), then nothing stands in the way of a good pizza.

Yes, the pizza stone is suitable for electric and gas ovens and grills.

Unfortunately, we are unable to procure the 35cm version.