Working with stone and bricks is fun!
Soil was processed to get building mud, dried under sun resulting in un-burnt mud blocks, fired up to get burnt bricks, then evolved into better types like chamber and wire-cut bricks. India exhibits, historically and otherwise, a wide range of brick structures.
In composite masonry walls, needless to say, bricks are among the most commonly used. The outside demands burnt clay blocks or wire cut bricks with high surface density and resistance to wear and tear, while the inside could be the normal table-molded bricks suited for plastered finish.
Granite stone, either as size stones or as slabs, is popular in composite walls along with bricks in Bangalore contexts, both being local materials. Just working with stone and bricks, often keeping stone outside for elevation and then reversing at other places, making it the internal wall, is actually fun! The resulting external and internal patterning can be so interesting; no additional efforts would be called for to create the building elevation.
Leaving material exposed
Why are we repeatedly emphasising on leaving the material exposed? It is not only to reduce heat gain, but equally well to reduce construction and maintenance costs.
People working with textiles can tell how cheap the basic cloth is and how finishing it demands money. Hence, using khadi or simple kora cloth is always an economical solution.