Sandstone is primarily composed of this mineral.
Venus' hairstone consists of this mineral with rutile ("ROO-tile") interspersed within. Citrine ("SIT- reen") is formed through heating the "smoky" form of this mineral, whose rarer forms consist of a "rose" form as well as amethyst. Sandstone is primarily composed of this mineral. Silicon dioxide is the primary composition of, for 10 points, what mineral, number 8 on the Mohs scale, which is used in glass and sandpaper?
Venus' hairstone consists of this mineral with rutile ("ROO-tile") interspersed within.
{quartz}