Question

what is Pietra Durga​

Answer 1

Explanation:

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. The resulting decorative mosaics were used primarily for tabletops and small wall panels.

The term pietra dura signifies the requisite hardness and durability of the materials used in this work, officially describing those stones that fall between the 6th and 10th degrees of the Mohs scale of hardness—that is, between feldspar and diamond. The most commonly used of these hard stones were quartzes, chalcedonies, agates, jaspers, granites, porphyries, and petrified woods, all of which are variable in hue and together provide an almost limitless range of colour. Lapis lazuli, a semihard stone of brilliant blue, was the only stone regularly used in commesso work that does not fall into the pietra dura classification.

Answer 2

Answer:

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Pietra dura (Italian: [ˈpjɛːtra ˈduːra]) or pietre dure [ˈpjɛːtre ˈduːre] (see below), called parchin kari or parchinkari (Persian: پرچین کاری‎) in the Indian Subcontinent, is a term for the inlay technique of using cut and fitted, highly polished colored stones to create images. It is considered a decorative art.

The stonework, after the work is assembled loosely, is glued stone-by-stone to a substrate after having previously been "sliced and cut in different shape sections; and then assembled together so precisely that the contact between each section was practically invisible".

Stability was achieved by grooving the undersides of the stones so that they interlocked, rather like a jigsaw puzzle, with everything held tautly in place by an encircling 'frame'.

Many different colored stones, particularly marbles, were used, along with semiprecious, and even precious stones. It first appeared in Rome in the 16th century, reaching its full maturity in Florence. Pietra dura items are generally crafted on green, white or black marble base stones.

Typically, the resulting panel is completely flat, but some examples where the image is in low relief were made, taking the work more into the area of hardstone carving

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