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  2. Fluorite - Wikipedia

    en.wikipedia.org/wiki/Fluorite

    Every color of the rainbow in various shades is represented by fluorite samples, along with white, black, and clear crystals. The most common colors are purple, blue, green, yellow, or colorless. Less common are pink, red, white, brown, and black. Color zoning or banding is commonly present.

  3. Rainbow lattice sunstone - Wikipedia

    en.wikipedia.org/wiki/Rainbow_lattice_sunstone

    Rainbow lattice sunstone was first discovered in late 1985 by Darren Arthur and Sonny Mason, on a small claim owned by Mason. The original source is located at what is now known as the Rainbow Caterpillar Mine, in the Harts Range northeast of Alice Springs in the Northern Territory of Australia. It was identified at the GIA and declared a new ...

  4. ROYGBIV - Wikipedia

    en.wikipedia.org/wiki/ROYGBIV

    The conventional gradient colors of the rainbow symbol. ROYGBIV is an acronym for the sequence of hues commonly described as making up a rainbow: red, orange, yellow, green, blue, indigo, and violet. When making an artificial rainbow, glass prism is used, but the colors of "ROY-G-BIV" are

  5. Sunstone - Wikipedia

    en.wikipedia.org/wiki/Sunstone

    The middle part of this crystal sparkles, and usually the color is darkest in the middle and becomes lighter toward the outer edges. The feldspar which usually displays the aventurine appearance is oligoclase , though the effect is sometimes seen in orthoclase : hence two kinds of sunstone are distinguished as "oligoclase sunstone" and ...

  6. Iridescence - Wikipedia

    en.wikipedia.org/wiki/Iridescence

    Iridescence is also found in plants, animals and many other items. The range of colours of natural iridescent objects can be narrow, for example shifting between two or three colours as the viewing angle changes, [5] [6] An iridescent biofilm on the surface of a fish tank diffracts the reflected light, displaying the entire spectrum of colours ...

  7. Rainbow - Wikipedia

    en.wikipedia.org/wiki/Rainbow

    The number of colour bands of a rainbow may therefore be different from the number of bands in a spectrum, especially if the droplets are particularly large or small. Therefore, the number of colours of a rainbow is variable. If, however, the word rainbow is used inaccurately to mean spectrum, it is the number of main colours in the spectrum.

  8. Jasper - Wikipedia

    en.wikipedia.org/wiki/Jasper

    Jasper, an aggregate of microgranular quartz and/or cryptocrystalline chalcedony and other mineral phases, [1] [2] is an opaque, [3] impure variety of silica, usually red, yellow, brown or green in color; and rarely blue. The common red color is due to iron(III) inclusions. Jasper breaks with a smooth surface and is used for ornamentation or as ...

  9. Pleochroism - Wikipedia

    en.wikipedia.org/wiki/Pleochroism

    At another angle, the light passing through the crystal will be composed of another combination of light paths and polarizations, each with their own color. The light passing through the mineral will therefore have different colors when it is viewed from different angles, making the stone seem to be of different colors.

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