The model was made in Corona 9, Corona LegacyMtl, renders correctly up to Corona 2 with PBR
To Vray Next, converted using the built-in converter
All textures and models have unique names

https://www.1stdibs.com/furniture/asian-art-furniture/furniture/pebble-stool-type-01-natural-acacia-wood/id-f_26174302/ 
A stool made of acacia wood, on three legs, which looks like a man-made rock. This work was created through the ability to create pieces without a clear plan until they become a work of art that reflects the finest craftsmanship in woodworking. Moreover, the texture of the stool is not polished to give it a smooth finish. In this product, deliberate imperfections make the work done by hand stand out from industrial products.