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Rock Hounding Fun

Across
Specimens as found in the field or an unfaceted gemstone
Contact metamorphic rock of shale and mudstone
Hard, gray rock, sedimentary
Type of quartz composed of silicon dioxide
Salt in rock form
Australian for rock hunting
Prismatic, columnar crystals often with shiny faces
Chisel-like tool
Down
Measurement used in reference to gemstones
Dark, green volcanic rock
Animal or plant remains of previous age preserved in rock
Material with a valuable element usually a precious metal
Intrusive igneous rock of quartz, mica, feldspar
Color reflections or color flashes in a mineral
Roundish cavity in sedimentary rock with crystals
A rock mostly composed of volcanic ash