mineral

Rutilated Quartz

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

AI-generated identification · may be incorrect

Hardness: 7 (Mohs), Color: Clear/translucent with golden, silver, or reddish hair-like needle inclusions. Luster: Vitreous. Crystal Structure: Hexagonal (trigonal). No cleavage.

Luster: Vitreous

Identified May 2, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs), Color: Clear/translucent with golden, silver, or reddish hair-like needle inclusions. Luster: Vitreous. Crystal Structure: Hexagonal (trigonal). No cleavage.

Formation & geological history

Formed through the crystallization of magma or hydrothermal activity where rutile needles grow inside the quartz crystals as they cool. Most commonly found in granite pegmatites and metamorphic rocks.

Uses & applications

Primarily used in jewelry as gemstones (cabochons or faceted), for lapidary arts, and as mineral specimens for collectors. It is also significant in metaphysical communities.

Geological facts

The needle-like inclusions are known as 'Venus hair' or 'Angel hair'. While rutile by itself is usually opaque and dark, when trapped in quartz, it often takes on a brilliant metallic gold or silver appearance.

Field identification & locations

Identify by looking for fine, needle-like metallic inclusions trapped inside clear or smoky quartz. Common locations include Brazil, Madagascar, and the United States (North Carolina).