Synthetic resin( PS,PP,etc) and luminescent material Yellow-greenblue or blue-green etc, custom made AppearanceYellowish Resin StonesMaterialsSynthetic resin( PS,PP,etc) and luminescent materialGlowing ColorYellow-greenblue or blue-green etc, custom madeDurationMore than 10 hoursLifeMore than 20 yearsSizeSmall pebble: around 2.5x1.5x1cmBig pebble: around 5x4x1.5cm: custom madeWeightSmall pebble: ...