Rutilated Quartz

Hardness: 7 on Mohs scale (for quartz); Color: Clear to smoky quartz with metallic gold, red, or black rutile needles; Luster: Vitreous; Crystal Structure: Hexagonal (for quartz); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65 for quartz, rutile is denser (4.2-4.3)

Rutilated quartz forms when acicular (needle-like) crystals of titanium dioxide (rutile) grow within quartz crystals. This typically occurs in veins and pegmatite deposits during hydrothermal processes, often at elevated temperatures and pressures. The rutile forms first, and then the quartz grows around it, encapsulating the needles. Geological age varies depending on the specific deposit.

Predominantly used in jewelry (beads, cabochons, faceted stones) due to its unique aesthetic. It is also collected by mineral enthusiasts. It is not generally used in industrial applications, which typically demand pure quartz or rutile separately.

Rutilated quartz is sometimes referred to as 'Angel Hair Quartz' due to its delicate, hair-like inclusions. The orientation and density of the rutile needles can create various patterns, making each piece unique. Some cultures believe rutilated quartz has positive energetic properties, especially for spiritual growth and clarity of thought.

Identify rutilated quartz by its clear or smoky quartz host containing distinct needle-like inclusions of rutile, which can range in color from gold to reddish-brown or black. The needles often cross or form star-like patterns. It is commonly found in Brazil, Australia, Kazakhstan, Norway, and the USA (Arkansas, North Carolina). In the field, look for quartz veins or pegmatite dikes; the rutile inclusions will be visible within transparent quartz crystals.