Render previews are done in Corona Render 11. Material: Corona Physical Mtl

The 3D model includes the Turbosmooth modifier. Render Iters: 1.

Number of Polys and Verts without Turbosmooth: Polys — 4,980, Verts — 4,984.
Number of Polys and Verts with Turbosmooth 1: Polys — 39,848, Verts — 19,926.
In the render — 2 iterations of TurboSmooth. Adjust the smoothing level as needed.

To optimize the scene, you can remove the invisible inner walls of the vase by selecting polygons with ID=2 in the "Material IDs" section.

Reference: https://pinterest.com/pin/207095282861178434/ 

A version of Corona Render no lower than 1.5 is required. For Corona Render, it is recommended to install a version no lower than 1.5, as the glossiness of the materials is set considering PBR.