Sentence Examples


  • The boulder is a crystalline rock consisting of pyroxene (chrome-diopside), garnet, and a little olivine, and is studded with diamond crystals; a portion of it is preserved in the British Museum (Natural History).
  • It seems therefore that a holocrystalline pyroxene-garnet rock may be one source of the diamond found in blue ground.
  • The pyroxenes may be pale green diopside, dark green aegirine-augite, or blackish green aegirine (soda iron pyroxene), and in many cases are complex, the outer portions being aegirine while the centre is diopside.
  • Both Great and Little Ararat consist entirely of volcanic rocks, chiefly andesites and pyroxene andesites, with some obsidian.
  • The rocks are liparites, dacites, hornblende and pyroxene andesites.