Crystal garden

Crystal garden

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Credit: DAVID TAYLOR/SCIENCE PHOTO LIBRARY

Caption: Side view of a "crystal garden". The long coloured streamers are the crystals themselves. The medium in which they grow is a saturated solution of sodium silicate or water glass. A number of different crystals are growing in this garden (not all of which are visible here). Each type has a characteristic colour; copper nitrate (light blue), cobalt chloride (dark blue), ammonium iron (III) sulphate (brown), magnesium nitrate (white) and iron (II) sulphate (green). Crystals form when a saturated solution of a suitable substance is either cooled or has some of its solvent removed by evaporation. The growth usually starts around small introduced seed crystals.

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Keywords: ammonium sulphate, chemical, chemistry, cobalt chloride, compound, compounds, copper nitrate, crystal, crystal garden, crystal mix, crystals, iron sulphate, magnesium nitrate

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