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The^Bob: Agate, vis-IR transmission and 404nm fluorescence
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The^Bob: Observing Mt Etna - thermal emission from lava
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The^Bob: OH absorption lines in blue topaz
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The^Bob: Topaz yellow & blue vis-IR transmission
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The^Bob: Blue beryl, vis and IR transmission
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The^Bob: The colour of the ocean
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The^Bob: Blue and red images of the eastern hemisphere
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The^Bob: Cyclosilicates iolite, emerald and tourmaline
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The^Bob: Blue tourmaline, visible-IR transmission
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The^Bob: Hyalite transmission and fluorescence, wavenumber scale
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The^Bob: Hyalite transmission and fluorescence, nm scale
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The^Bob: Green and pink tourmaline, visible-IR transmission
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The^Bob: Water in minerals: emerald
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The^Bob: Green opal, visible-IR transmission
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The^Bob: Hyalite white light and 254nm Hg illumination
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The^Bob: Eroded cliff at a bend in the river Isar
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The^Bob: Spectrum of a thundercloud_3
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The^Bob: Spectrum of a thundercloud - supplement
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The^Bob: UV-nir transmission of leaf
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The^Bob: Ulexite transmission vis-nir
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The^Bob: Hurricane bertha over Munich
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The^Bob: The spectrum of a thundercloud
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The^Bob: Emerald pebble 960nm water absorption
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The^Bob: Cyanobacterium in halite, fluorescence
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The^Bob: Salar de Llamara location
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The^Bob: Measuring chlorophyll in halite transmission
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The^Bob: Bacterium for greening Mars?
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The^Bob: Ripples of blue
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The^Bob: Stromatolite
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The^Bob: Isar reflections