Although Iodine has a luster, it is a non-metal.
No, iodine is a nonmetal.
Iodine is a lustrous, metallic gray solid, with violet vapor escaping direct from the solid (sublimation) at a temperature of about 40°C - 100°C (but certainly below 113°C).
iodine is not metallic
Bromine is a reddish brown liquid at room temperature, is reddish brown as a gas. As a solid (below its melting point -7.2 °C, 19 °F) it does have a metallic lustre. This is similar to iodine which is solid at room temperature and has a metallic lustre too.
Iodine
Although Iodine has a luster, it is a non-metal.
No solid iodine does not conduct electricity.
Elemental iodine is a solid. But it is a volatile solid in that chemists will use solid iodine in a chamber to "iodine stain" substances in thin layer chromatography. Thus iodine is like having a volatile solid.
Solid in room temperature.
The appearance of iodine crystals: lustrous, metallic, gray.
Iodine is a solid at STP.
The color of solid iodine is a dark purple.
An example is sulfur.