Document status: incomplete. Quartz is a term that includes both well crystallized and compact forms of silica. For the most time the different quartz varieties have been considered as species of their own and have not been systematically grouped together before the 19th century.
Samuel Ullman (born April 13, 1840 in Hechingen, Germany; died March 21, 1924 in Birmingham) was a hardware dealer, a long-time member of the Birmingham Board of Education, a lay leader at Temple Emanu-El, and a writer whose poem, Youth, is celebrated worldwide.
Rabbi Menachem Mendel Schneerson (April 5, 1902 OS-June 12, 1994 NS), known as the Lubavitcher Rebbe or just the Rebbe was a prominent Hasidic rabbi who was the seventh and last Rebbe (Hasidic leader) of the Chabad-Lubavitch movement.