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Unformatted text preview: Some fossils contain pyrite. This mineral reacts with oxygen from the air and after some time your fossil is reduced to dust. You have to seal your fossil from the air. You can do this by putting your fossils in molten paraffin (candle wax). Leave them in there for about 10 minutes and let them cool down. Example of pyrite Most other fossils do not require special treatment. Below you can see a sea urchin from the Algarve, Portugal before and after preparation. The preparation took about 25 hours. Before: This was how the sea urchin was looking before preparation. The fossil was still coated with chalk en the fossil was full of fractures. After: The sea urchin first was carefully taken apart. The seven pieces were brushed clean and after that glued together again. After a few days, the remains of the sediment were carefully removed with a pincer and a small screwdriver....
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- Spring '10