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Photographic gallery.  Thousands of particles under the microscope.

Heterochromatic Colors

. . . Transition Metals Colors

. . . . . . Copper

3d Electrons Colors 3d Electrons Colors 3d Electrons Colors 3d Electrons Colors 3d Electrons Colors 3d Electrons Colors 3d Electrons Colors

. . . . . . Iron

Hematite Hematite Hematite Sphere Hematite Sphere Limonite Rust

. . . . . . Nickle

Nickle Acetate Nickle Acetate Nickle Acetate Nickle Acetate

. . . . . . Cobalt

Cobalt Chloride Cobalt Chloride Cobalt Nitrate Cobalt Nitrate

. . . . . . Chromium

Chromium Chloride Chromium Chloride Chromium Chloride