Rutile, a mineral composed mainly of titanium dioxide (TiO₂), is a common inclusion in quartz in the form of profuse acicular hair-like crystals.
These golden needle inclusions are appreciated as a pleasing feature, giving their name to the variety known as rutilated quartz.
Rutilated quartz (also called Titanium Crystal), is a variety of quartz which contains needle like inclusions of rutile.
The value of rutilated quartz under jewellery grade got increased a lot recent years, especially for the special pattern of inside inclusions.