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  2. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    Download as PDF; Printable version; In other projects Wikimedia Commons; Wikidata item; ... Rock crystal (var.) Shocked quartz (var.) Smoky quartz (var.) Quartzite; R–Z

  3. List of minerals - Wikipedia

    en.wikipedia.org/wiki/List_of_minerals

    Amethyst crystals – a purple quartz Apophyllite crystals sitting right beside a cluster of peachy bowtie stilbite Aquamarine variety of beryl with tourmaline on orthoclase Arsenopyrite from Hidalgo del Parral, Chihuahua, Mexico Aurichalcite needles spraying out within a protected pocket lined by bladed calcite crystals Austinite from the Ojuela Mine, Mapimí, Durango, Mexico Ametrine ...

  4. List of U.S. state minerals, rocks, stones and gemstones

    en.wikipedia.org/wiki/List_of_U.S._state...

    This page provides a comprehensive list of U.S. state minerals, rocks, stones, and gemstones.

  5. Category:Gemstones - Wikipedia

    en.wikipedia.org/wiki/Category:Gemstones

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  6. Crystal - Wikipedia

    en.wikipedia.org/wiki/Crystal

    A crystal's crystallographic forms are sets of possible faces of the crystal that are related by one of the symmetries of the crystal. For example, crystals of galena often take the shape of cubes, and the six faces of the cube belong to a crystallographic form that displays one of the symmetries of the isometric crystal system. Galena also ...

  7. For the Very First Time, We've Actually Filmed Sound Waves ...

    www.aol.com/lifestyle/very-first-time-weve...

    Scientists successfully filmed sound waves in a diamond crystal structure for the first time ever using an X-ray free-electron laser (XFEL).

  8. List of rock types - Wikipedia

    en.wikipedia.org/wiki/List_of_rock_types

    The following is a list of rock types recognized by geologists.There is no agreed number of specific types of rock. Any unique combination of chemical composition, mineralogy, grain size, texture, or other distinguishing characteristics can describe a rock type.

  9. Dendrite (crystal) - Wikipedia

    en.wikipedia.org/wiki/Dendrite_(crystal)

    A crystal dendrite is a crystal that develops with a typical multi-branching form, resembling a fractal. The name comes from the Ancient Greek word δένδρον ( déndron ), which means "tree" [ citation needed ] , since the crystal's structure resembles that of a tree.

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