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this is a stone! “Agate (pronounced /ˈæɡət/) is a microcrystalline variety of quartz (silica), chiefly chalcedony, characterised by its fineness of grain and brightness of color.” - http://en.wikipedia.org/wiki/Agate
Dynamically Changeable Physical Buttons on a Visual Display - http://chrisharrison.net/projects/pneumaticdisplays/
Still Life still alive - http://24flinching.com/word/gold-seal/inspiring-artists/still-life-still-alive/