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137-Citrine $9.00
Mystery includes rock, fossil, or mineral sample and Mystery questions with teaching instructions.

A sample of citrine crystals

-- To introduce citrine
-- To introduce the concept of varieties of the same basic mineral, i.e. kinds of quartz
-- To introduce the concept of hole color centers in crystals
-- To introduce the concept of radiation or heat changing the internal organization of a natural material
-- To provide an opportunity to develop and use a chemical formula for a mineral
-- To open a discussion about sources of natural radioactivity

GRADES 11-16
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Ruth Deike
Rock Detective Geoscience Education
395 Deer Run Drive
Nellysford , VA 96080

Phone: 434-263-3737



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