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Asterism is generated by reflections of light from twin-lamellae or from extremely fine needle-shaped acicular inclusions within the stone's crystal structure. [1] A common cause is oriented sub-microscopic crystals of rutile within the gem mineral. It occurs in rubies, sapphires, garnet, diopside, and spinel when a cabochon is cut from a ...
YouTube Music is a music streaming service developed by the American video platform YouTube, a subsidiary of Google.The service is designed with a user interface that allows users to explore songs and music videos on YouTube based on genres, playlists, and recommendations.
To achieve a moderate number of medium-sized crystals, a container which has a few scratches works best. Likewise, adding small previously made crystals, or seed crystals, to a crystal growing project will provide nucleating sites to the solution. The addition of only one seed crystal should result in a larger single crystal.
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In geology, macrocrystalline rocks have crystals large enough to easily be identified by sight with the naked eye. Macrocrystalline rocks can be further subdivided into fine-grained, medium-grained, large-grained, and coarse-grained rock, where fine-grained rocks have a grain size of less than 1 mm, medium-grained rocks have a grain size of 1 to 5 mm, large-grained rocks one of 5 to 10 mm, and ...
Bill Clinton “Hillary and I mourn the passing of President Jimmy Carter and give thanks for his long, good life,” Clinton, the country's 42nd president, said in a statement on Sunday.
Presidents have handled Christmas Eve differently as they can designate it as a holiday for federal employees. During President-elect Donald Trump's first term, he gifted federal employees ...
Pages in category "Crystals" The following 97 pages are in this category, out of 97 total. This list may not reflect recent changes. ...