Fine Arts and Art Installation Design Micro Matter miniature sculptures in glass test tubes by Rosa de Jong The Micro Matter series is designed to take you out of this world for a moment, into another. It consists of a series of miniature worlds, floating inside upside-down glass test tubes. Towering houses, sky scrapers, campsites and a water tower, each sculpture inspires the next. Except for the glass tubes, everything is handmade. All different kinds of material are used, that are found while traveling or out in nature.