Asked in Metal and AlloysCalcium
Metal and Alloys
What is the lustre of calcium?
What is the lustre of a metal?
Can you use lustre in a sentence?
Is lustre a chemical property or physical property?
Asked in Metal and Alloys
Why copper vessels exposed to air few days loses its lustre?
Asked in Books and Literature
Why note book has lustre and eraser does not have?
Asked in Science
What is the lustre due to?
Lustre is a surface characteristic of a solid, and is defined by the degree of smoothness of the material. It is a subjective quality. Glassy materials have very smooth (almost without grain) surface and are called 'vitreous lustre'. Most metals in their native state are not this smooth, and so one will speak of a 'metallic lustre'. Though they may be polished to rearrange the surface molecules, and thus alter their lustre. Similarly with greasy and pearly lustre and so on. Though a qualitative measure, it is of some use in identifying minerals.