No, not all shiny materials are metals. While metals like gold, silver, and iron are known for their shiny appearance, other non-metal materials can also be shiny. For example, glass and some plastics can be shiny depending on how they are polished or treated. The shininess of a material is due to its ability to reflect light, and this property can be found in both metals and non-metals. So, while metals are often shiny, they are not the only materials that can have a lustrous appearance.

This question related to Chapter 6 Science Curiosity Class 6th NCERT.
From the Chapter 6. Materials Around Us.
Give answer according to your understanding.