Lustre (British English) or luster (American English; see spelling differences) is the way light interacts with the surface of a crystal, rock, or mineral. The word traces its origins back to the Latin lux, meaning "light", and generally implies radiance, gloss, or brilliance.

Adamantine Luster: An octahedral diamond crystal in positive relief on the surface of its host rock. Adamantine is the highest level of luster. This diamond crystal is estimated to be approximately 1.5 carats and is from the Udachnaya Mine, Yakutia, Siberia, Russia. Specimen and photo by Arkenstone / www.iRocks.com.

Gemstone luster generally refers to a gem's base appearance. However, the gem's condition may affect its luster. A gemstone can have a polish luster (its appearance when polished) that varies greatly from its base luster.

2019年5月25日 · Luster, also spelled lustre, is a simple word for a complex thing: the way light interacts with the surface of a mineral. This gallery shows the major types of luster, which range from metallic to dull.

Luster refers to the quality and intensity of light reflected from the surface of a substance, particularly minerals, gemstones, or metals. It describes how light interacts with the material’s surface, giving it a particular appearance. Luster is determined by the mineral’s surface texture, transparency, and reflective qualities.

Luster describes how a mineral appears to reflects light, and how brilliant or dull the mineral is. The terms used to describe luster are: Metallic - Minerals with a metallic luster are opaque and reflective, like metal. The metal lic elements, most sulfides, …

In an introductory course, luster is a described as a property of light reflection that separates metallic from non-metallic minerals. Determining luster can be difficult for a beginner.

What is Luster in Gemstones or Lustrous Stones? Luster is the property of minerals to reflect the light from the outer surface of the gemstones. These reflections of light are internal and make it look transparent in the case of facet stones. The light inside gemstones cannot be called luster.

2023年5月31日 · Luster measures the kind of quality and quantity of light reflected by a mineral or crystal surface. Pearly describes reflectance or appearance in reflected light. Other common mineral lusters are metallic, submetallic, adamantine, resinous, …

2024年8月3日 · Understanding the types of luster is essential for fields such as geology, mineralogy, and materials science. Luster can generally be categorized into metallic and non-metallic types, each with distinct characteristics that reveal information about the material’s composition and structure.