1 Flat Red Transparent Marble 12 mm

A small, translucent red pebble with a flat face

Twelve millimetres of translucent red glass, flattened on one face. Light passes through the pebble and casts the red onto the surface beneath it, paler at the centre than at the edges. At this size, many can be lined up on a small surface: the red becomes a texture rather than a spot.

The exact count, no pre-packed bag required

An arrangement rarely calls for a round number. At My-GlassMarbles the flat marble is sold individually, so you can stop counting exactly where the surface ends, and buy the same item again later without anything looking mismatched.