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Show-and-tell rock
Answer for the clue "Show-and-tell rock ", 5 letters:
geode
Alternative clues for the word geode
Word definitions for geode in dictionaries
Douglas Harper's Etymology Dictionary
Word definitions in Douglas Harper's Etymology Dictionary
rounded stone with a hollow center lined with crystals, 1670s, from French géode , from Latin geodes , from Greek geodes "earthy, earth-like," from ge "earth" (Homeric gaia ; see Gaia ) + -oides , adjective suffix, "characterized by." Perhaps so called ...
WordNet
Word definitions in WordNet
n. (mineralogy) a hollow rock or nodule with the cavity usually lined with crystals
Usage examples of geode.
Not the least curious part of this outcrop is the black thread of iron silicate which, broken in places, subtends it to the east: some specimens have geodes yielding brown powder, and venal cavities lined with botryoidal quartz of amethystine tinge.
The music swelled in a crescendo, cube-drums, ice-horns, percussion geodes, and more, all in perfect harmony.
Quantities of quartz crystals, geodes, apache tears, jasper pebbles, moonstone beads, and….
Treasure seekers of this kind found a stone that looked like a geode in 1961 near Olancha, on the edge of the Amargosa Desert.