Gecko stones are interlocking tiles which can be used to cover a plane area without gaps or overlaps.
Day gecko, leopard gecko and crested gecko
One common use is in tiling.
Gecko
The most common type of house pet of the gecko is the leopard gecko and other geckos
One common use is tiles in a bathroom.
Tiled bathrooms and paved areas are common example.
Yes it is a tessellation.
Non-visible tessellation or non-existent tessellation, perhaps.
How to Make a Tessellation?
A regular tessellation or semi-regular tessellation or none.
Rare