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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
WordNet
Word definitions in WordNet
n. (mineralogy) a hollow rock or nodule with the cavity usually lined with crystals
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Geode \Ge"ode\ (j[=e]"[=o]d), n. [F. g['e]ode, L. geodes, fr. Gr. ? earthlike; ge`a, gh^, the earth + e'i^dos form.] (Min.) A nodule of stone, containing a cavity, lined with crystals or mineral matter. The cavity in such a nodule.
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.