Which term describes the relative size, arrangement, and contrast of bright and dark areas when viewed face-up?

• A. The overall condition of the facet surfaces of a finished diamond.
• B. The change in speed and possible change in direction of light as it travels from one material to another.
• C. The relative size, arrangement, and contrast of bright and dark areas when viewed face-up.
• D. The exactness of a finished gem's facet placement.

Answer: (C)

The key idea here is how light is distributed across the diamond’s face when viewed from above. The visible pattern of bright and dark areas—their relative sizes, how they’re arranged, and the contrast between them—depends on how the facets are sized and positioned. This face-up light pattern reflects the cut’s effectiveness at guiding light to return to the observer, influencing perceived brilliance and overall appearance.

That’s why this description best captures the concept: it focuses on the visual result of the facet arrangement as seen from the top, rather than on surface condition (polish), refraction behavior, or the exact precision of facet placements.