The moon waxes and wanes in harmony with the sun. We see it grow from a slim crescent into a full disk, before shrinking back into a sliver. This perpetual cycle inspired the Lunar series, which is designed to reflect the moonlight.
The outer half-sphere has a rough surface, like the moon itself, which contrasts with the highly reflective, convex interior. Individually, each piece mimics half the lunar cycle. Together, they create a full sphere with a textured scratch finish.