sandarach

/S AE1 N D ER0 AE0 K/
noun
  1. 1

    Realgar; red sulphide of arsenic.

  2. 2

    A white or yellow resin obtained from a north African tree (Tetraclinis articulata), and pulverized for pounce; probably so called from a resemblance to the mineral.

  3. 3

    Any tree from the genus Tetraclinis.

Source: https://en.wiktionary.org/wiki/sandarac, https://en.wiktionary.org/wiki/sandarach