What does adamantine luster describe?

What does adamantine luster describe?

• A. The lowest degree of luster
• B. The highest degree of luster
• C. A metallic luster
• D. A satin finish

Answer: (B)

Adamantine luster describes a surface shine that is extremely brilliant and diamond-like. It is the highest level of luster a mineral can exhibit, producing sharp reflections and strong brilliance, often with noticeable dispersion. This category is characteristic of minerals with very high refractive indices, such as diamonds and some sphalerites. It’s not a dull or satin sheen, and it’s not metallic in appearance—the term specifically marks the most intense, glassy-brilliant look.

Adamantine luster describes a surface shine that is extremely brilliant and diamond-like. It is the highest level of luster a mineral can exhibit, producing sharp reflections and strong brilliance, often with noticeable dispersion. This category is characteristic of minerals with very high refractive indices, such as diamonds and some sphalerites. It’s not a dull or satin sheen, and it’s not metallic in appearance—the term specifically marks the most intense, glassy-brilliant look.