Rose quartz occurs in a massive form, usually very imperfect and
cracked, and varying in color from rose-red to pink. The color is
supposed to be due to titanic acid, and often becomes paler on exposure.
This stone is nearly opaque and semi-transparent on the edges, has a
greasy lustre, and specific gravity of 2.65 to 2.75. Rabenstein near
Zwiesel in Bavaria, the United States, Brazil, France, Ceylon, Finland,
and Siberia are places where rose quartz has been found.