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.
David Rosen (disambiguation), several people, including: David Rosen (artist) (born 1959), South African artist and fashion designer. David Rosen (business) (born 1934), chief executive officer of SEGA. David Rosen (musicologist) (born 1938), professor of musicology at Cornell University.