I downloaded this 3D model of a glass vase and I tried fixing the material in Blender using Cycles as my rendering engine but it looks so different in comparison to the material preview. See screenshots below:

Can anyone figure out why this is happening? If anyone can help me out, I'd greatly appreciate it. Been stuck on this for so long already and I'm getting frustrated. I've tried almost everything but nothing seems to work (such as putting roughness to 0, transmission to 1, using glass bdsf, etc)