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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. The inclusions may be distributed randomly or in bundles, which sometimes are arranged ...
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.
Quartz. Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO 4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2. Quartz is, therefore, classified structurally as a framework silicate mineral ...
Dumortierite quartz is blue colored quartz containing abundant dumortierite inclusions. Dumortierite was first described in 1881 for an occurrence in Chaponost, in the Rhône - Alps of France and named for the French paleontologist Eugène Dumortier (1803–1873). [5] It typically occurs in high temperature aluminium rich regional metamorphic ...
Materials: Beloretsk quartz, rutilated quartz, obsidian, tiger eye, agate, lapis lazuli, ruby, petrified wood, jasper, gold, silver, labradorite, serdolic agate and nundoorite. Height 24 cm. [1]: 102 • In the Sultry Afternoon I: An obese man gorges on watermelon while enjoying a cool soak on a hot afternoon.
Acicular, in mineralogy, refers to a crystal habit composed of slender, needle-like crystals. Crystals with this habit tend to be fragile. Complete, undamaged acicular specimens are uncommon. Needle-shaped acicular millerite crystals on white quartz. The term "acicular" derives from the Late Latin "acicula" meaning "little needle". [1]
An aerial view of quartz mines in Spruce Pine, N.C., as taken from a plane on Monday, Sept. 30, 2024. (AP Photo/Gary D. Robertson) (ASSOCIATED PRESS)
She respected Matsukata's incorporation of non-precious stones such as rutilated quartz with precious stones and found objects. Creating settings for stones such as rutilated and tourmalinated quartz remained a material of interest for Moty over the next thirty years.
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