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  2. Kryptonite - Wikipedia

    en.wikipedia.org/wiki/Kryptonite

    Kryptonite is a fictional material that appears primarily in Superman stories published by DC Comics.In its best-known form, it is a green, crystalline material originating from Superman's home world of Krypton that emits a unique, poisonous radiation that can weaken and even kill Kryptonians.

  3. Peridot - Wikipedia

    en.wikipedia.org/wiki/Peridot

    Peridot is one of the few gemstones that occur in only one color: an olive-green. The intensity and tint of the green, however, depends on the percentage of iron in the crystal structure, so the color of individual peridot gems can vary from yellow, to olive, to brownish-green. In rare cases, peridot may have a medium-dark toned, pure green ...

  4. List of fictional elements, materials, isotopes and subatomic ...

    en.wikipedia.org/wiki/List_of_fictional_elements...

    Kryptonite: DC Comics: A radioactive crystal originating from the planet Krypton that is harmful to Kryptonians. Kryptonite comes in various colors with differing effects, and has been variously depicted as an element and compound. Kyber crystal: Star Wars: A rare, semi-sentient, crystalline material found across the galaxy.

  5. Pleochroism - Wikipedia

    en.wikipedia.org/wiki/Pleochroism

    Pleochroism is an extremely useful tool in mineralogy and gemology for mineral and gem identification, since the number of colors visible from different angles can identify the possible crystalline structure of a gemstone or mineral and therefore help to classify it. Minerals that are otherwise very similar often have very different pleochroic ...

  6. Porphyry (geology) - Wikipedia

    en.wikipedia.org/wiki/Porphyry_(geology)

    In its non-geologic, traditional use, the term porphyry usually refers to the purple-red form of this stone, valued for its appearance, but other colours of decorative porphyry are also used such as "green", "black" and "grey". [1] [2] The term porphyry is from the Ancient Greek πορφύρα (porphyra), meaning "purple".

  7. What Your Front Door Color Means and Says About You

    www.aol.com/front-door-color-means-says...

    “A front door carries much more meaning than the official entrance of our home,” says Michelle Lewis, Color Psychology expert and author of Color Secrets. She explains that in various global ...

  8. Aragonite - Wikipedia

    en.wikipedia.org/wiki/Aragonite

    Aragonite is a carbonate mineral and one of the three most common naturally occurring crystal forms of calcium carbonate (Ca CO 3), the others being calcite and vaterite.It is formed by biological and physical processes, including precipitation from marine and freshwater environments.

  9. Heliotrope (mineral) - Wikipedia

    en.wikipedia.org/wiki/Heliotrope_(mineral)

    Other colors of chalcedony may also occur in Indian bloodstone, such as white, yellow, or blue. This semiprecious stone should not be confused with other ornamental stones that contain red jasper. Setonite, also called African bloodstone, is composed of red jasper, grey chalcedony, and pyrite .