Containing the needle like mineral Rutile as impurities.

Inclusions of rutile, as in rutilated quartz, which is quartz filled with acicular golden needles of rutile.

Quartz Rutilated quartz is a type of rock crystal which contains long, fine needles of rutile crystals (titanium dioxide). It is also known as Venus' Hair Stone, Cupid's darts, and Fleches d'amour (arrows of love).