a. [f. as prec. + -OSE.] Mainly or entirely composed of quartz; of the nature of quartz.
1757. Da Costa, Fossils, 275. Pellucid quartzose grains it has none.
1857. Birch, Anc. Pottery (1858), II. 332. Some varieties of this ware are filled with quartzose sand.
1878. A. H. Green, etc. Coal, ii. 47. Thick masses of very coarse quartzose conglomerate.
So † Quartzous a. Obs.
1790. Monthly Rev., III. 547. It appears, that hard quartzous and silicious stones give a reddish light.
1815. Chron., in Ann. Reg., 540. The sand … is quartzous.
