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Rutilated quartz used as a gemstone. Rutilated quartz is a variety of quartz which contains acicular (needle-like) inclusions of rutile. [1] It is used for gemstones. These inclusions mostly look golden, but they also can appear silver, copper red or black.
Rutile in quartz Within the igneous environment, rutile is a common accessory mineral in plutonic igneous rocks , though it is also found occasionally in extrusive igneous rocks , particularly those such as kimberlites and lamproites that have deep mantle sources.
Among the well-known types of quartz are rose quartz (which has a delicate pink colour), and smoky quartz (which comes in a variety of shades of translucent brown). Some other gemstones, such as Amethyst and Citrine, are also part of the quartz family. Rutilated quartz is a popular type of quartz containing needle-like inclusions. Ruby
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The term "acicular" derives from the Late Latin "acicula" meaning "little needle". [1] Strictly speaking, the word refers to a growth habit that is slender and tapering to a point. Prismatic crystals are not acicular; however, colloquial usage has altered the commonly understood meaning of the word.
Although there are more than 100 species of lemurs, the ring-tailed lemur is arguably the most well-known thanks to King Julien in the hit children’s film Madagascar. His need to “move it ...
Earth sciences portal; Rutile is part of WikiProject Rocks and minerals, an attempt at creating a standardized, informative, comprehensive and easy-to-use rocks and minerals resource.
Cristobalite (/ k r ɪ ˈ s t oʊ b ə ˌ l aɪ t /) is a mineral polymorph of silica that is formed at very high temperatures. It has the same chemical formula as quartz, Si O 2, but a distinct crystal structure.