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163-Onyx Marble $5.00
Mystery includes rock, fossil, or mineral sample and Mystery questions with teaching instructions.

SAMPLE:

-- A sample of onyx marble that is compact, banded, translucent, and WILL FIZZ IN ACID. This mystery requires calcium (or other) carbonate composition, hence travertine from limestone caves is appropriate.

TEACHING OBJECTIVES:
-- To introduce onyx marble, a popular rock for collectors, because it is dense and takes a good polish. It is used as a decorative or architectural material or for small ornamental objects.
-- To introduce the concept of two names (onyx marble and travertine) for the same rock
-- To introduce the term, transluscent
-- To introduce the concept of caves
-- And for older students, to introduce the concept of water dissolving rock (specifically limestone) to form an opening called a cave

GRADES 5-8
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Ruth Deike
Rock Detective Geoscience Education
395 Deer Run Drive
Nellysford , VA 96080

Phone: 434-263-3737

EMAIL:

 

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