(n.) A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity.

April showers Dalmatian Gila monster Proteus Vicar of Bray agama alligator anole antigorite bearded lizard blindworm box turtle butterfly butterfly agama candy cane cayman cheetah chrysotile cloud shapes confetti crazy quilt crocodile diamondback dragon false map turtle firedog flying dragon formalist gavial gecko girdle-tailed lizard glass snake green turtle harlequin hawksbill hawksbill turtle iguana iris jaguar kaleidoscope leatherback leopard lizard mackerel mackerel sky marble marbled paper matamata mercury moire monitor moon mother-of-pearl mugger nacre ocelot opal ophite patchwork quilt peacock quicksilver rainbow rolling stone sea turtle serpentine serpentine marble shifting sands shot silk soft-shelled turtle spectrum stump tail teju temporizer terrapin the weather timepleaser timeserver tortoise tortoise shell trimmer tuatara turtle water weather vane weathercock wheel of fortune whirligig zebra