Which lighting setup describes side lighting used to reveal clarity characteristics against a dark background?

• A. Lighting from above
• B. Lighting from below
• C. Lighting from the side against a black non-reflective background
• D. Lighting from the side against a white background

Answer: (C)

When assessing clarity, the goal is to make internal features stand out. Side lighting does just that by entering the diamond at an angle and creating shadows along inclusions and internal planes. Those shadows provide strong contrast, so even small or faint clarity characteristics become visible. A black non-reflective background stops stray light from bouncing back into the view, keeping the surface and surroundings from adding glare or reflections that could obscure details.

If the background were white, reflections would wash out contrast and make it harder to distinguish inclusions. Lighting from above or below tends to flatten or distort internal features and doesn’t produce the same pronounced shadowing that side lighting with a dark background yields.