Shiny
It can, but is usually more of a gray colour.
Metalloids can exhibit a range of physical properties, including both metallic and non-metallic characteristics. This means that some metalloids can appear dull, while others can appear shiny. For example, boron is a metalloid that is typically dull in appearance, while silicon can have a shiny, metallic luster. The appearance of a metalloid depends on its specific atomic structure and bonding characteristics.
Galena is a metallic mineral that has a bright, shiny metallic luster when freshly broken. Over time, the surface can tarnish and become dull.
Luster refers to how light reflects off the surface of a mineral. It can be metallic, which is shiny like metal, or non-metallic, which includes qualities like silky, vitreous (glassy), pearly, or dull. Luster can help identify minerals in geology.
Tellurium has a shiny luster.
Cadmium has a shiny luster when freshly cut, but it can develop a dull gray patina over time when exposed to air.
Osmium is a shiny, silvery metal with a metallic luster.
That is the property of "luster".
Shiny
Germanium has a shiny metallic luster when freshly cut, but it quickly oxidizes in air, producing a dull gray appearance.
i think that it is dull
Iodine is typically a dull, dark gray or black solid in its natural form. It doesn't have a luster or shiny appearance like metals.
The property of metal is not luster or shininess, meteal is a dull color
Marble typically has a dull to glassy luster. This means that when polished, it can have a shiny appearance, but in its natural state, it is often more matte and earthy looking.
Sn is a shiny, silver-white metal. It exhibits a metallic luster and reflects light.
Jasper typically has a dull to vitreous luster, meaning it appears either somewhat shiny or glassy in appearance.