mineral
Rutilated Quartz
Rutile in Quartz (SiO2 with TiO2 inclusions)
Hardness: 7 (Mohs scale), Color: Clear to smoky host with gold, black, or reddish-brown needle-like inclusions, Luster: Vitreous/Adamantine (needles), Crystal Structure: Trigonal host / Tetragonal needles, Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Clear to smoky host with gold, black, or reddish-brown needle-like inclusions, Luster: Vitreous/Adamantine (needles), Crystal Structure: Trigonal host / Tetragonal needles, Specific Gravity: 2.65
Formation & geological history
Formed in pegmatites and hydrothermal veins where rutile crystals grow within the quartz host as it cools and crystallizes. Predominantly found in metamorphic and igneous environments.
Uses & applications
Commonly used in jewelry as cabochons, pendants, and faceted stones. Highly valued by mineral collectors and used in metaphysical practices.
Geological facts
The needle-like inclusions are often referred to as 'Venus Hair' or 'Angel Hair.' While quartz is common, the presence of well-formed rutile needles makes each specimen unique naturally.
Field identification & locations
Identify in the field by the distinct needle-like inclusions that appear to be trapped inside solid transparent quartz. Common locations include Brazil, Madagascar, and Sri Lanka.
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