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Experiments with Rocks and Minerals


Calcium Acetate Crystals

What you need: egg shells, vinegar (pickling vinegar s stronger and faster), container

    Pour 250 mL pickling vinegar into plastic tub (500 mL)
  • Crush eggshells and add to liquid.
  • Observe immediate reaction for 5 minutes
  • Pickling vinegar will create immediate bubbles (carbon dioxide) and the smaller pieces will be floated up to the surface on the gas bubbles.
  • Regular vinegar will not have as much of a pronounce effect but careful observation over a few days will show that there is less visible eggshell materials – namely it is dissolving
  • Place container in a warm spot where it can be undisturbed & observe changes every few days.
  • Evaporation & deposition will occur. Botryoidal crystal shapes will form on the sides of the tub. Looks like popcorn.

Calcium Acetate Crystals

What you need: egg shells, vinegar (pickling vinegar s stronger and faster), container

 

Rockhounding as a Hobby

1 Joining a Rock Club

2 Gem & Mineral Shows

3 Suppliers, Rock Shops

4 Museums

5 Rocks Outdoors

6 Collecting Rocks

7 Experiments