Define Pietradura and Shikhara​

:- Pietra dura, (Italian: “hard stone”), in mosaic, any of several kinds of hard stone used in commesso mosaic work, an art that flourished in Florence particularly in the late 16th and 17th centuries and involved the fashioning of highly illusionistic pictures out of cut-to-shape pieces of coloured stone.

:- Shikhara is the rising tower in the Hindu temple architecture of North India. It is also used in Jain temples. Shikhara is over Garbhagriha. Garbhagriha is the innermost sanctuary of a Hindu and Jain temple where the primary deity of the temple is kept.

the boundarys like convergent divergent and transform it causes subduction