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Hornfels is a fine-grained metamorphic rock that can range from dark to light in color. The original rock type was typically sandstone, clay or shale, limestone or diabase.
This natural rock comes in a cotton specimen collection bag with an information card including details on the rock formation, characteristics and uses. Specimen size ranges from 1-2 inches.
For age 4+ with adult supervision
Warning: Choking Hazard - Small Parts
Not for children under 3
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