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The inclusions may be distributed randomly or in bundles, which sometimes are arranged star-like, and they can be sparse or dense enough to make the quartz body nearly opaque. While otherwise inclusions often reduce the value of a crystal, rutilated quartz is valued for the quality of these inclusions. [2] [3]
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.
Needle-shaped acicular millerite crystals on white quartz. 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.
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
Download QR code; Print/export ... Varieties of the mineral Quartz. ... Rutilated quartz; S. Shocked quartz This page was ...
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