Quartz with mineral inclusions (mostly needle-like) is known as rutilated quartz, which contains inclusions of goethite, gold, pyrite, rutile and tourmaline. These needle-like inclusions can be black, red or brassy yellow and have a metallic luster.

Locations:

This variety of quartz is found in Madagascar, South Africa, Brazil, Sri Lanka, India, Switzerland and Germany.

Chemical Composition: Silicon Dioxide
Crystal Structure: Trigonal
Hardness: 7
Specific Gravity: 2.65
Refractive Index: 1.54-1.55
Colors: Colorless.
Luster: Vitreous

Astrological Relevance:

Rutile quartz is also considered to be one of the birthstones for the month of April, which covers two zodiac signs: Aries (March 21 To April 20) and Taurus (April 20 To May 21).