You have asked some large questions:
I assume you are working in LightWorks?
• Porcelain
This could be a lot of things - what material are you using?
I assume ceramic, glazed? Doesn't matter.
Dial in a little less mirror and a little more emission into the shader
• Yellow shade ["Son, stay away from that yellow shade because that's where the Huskies render"]
Perhaps it is a reflection in the mirror.
Dwight Atkinson