![I recently bought this ammonite cast fossil, and I noticed that it has some grey patches (you can see a couple of grey streaks at the top). Is it possible that these I recently bought this ammonite cast fossil, and I noticed that it has some grey patches (you can see a couple of grey streaks at the top). Is it possible that these](https://preview.redd.it/52lv3oe85ej31.jpg?auto=webp&s=23a1003a1ce097f68add67fde2e77e5054580b5f)
I recently bought this ammonite cast fossil, and I noticed that it has some grey patches (you can see a couple of grey streaks at the top). Is it possible that these
![Avie 🦄🦋🌿🌼🌳🗺🔎⚒🔮 on Twitter: "4. Cast/Mold fossil molds: empty space left after organism dissolves. https://t.co/giIVHyT7nw" / Twitter Avie 🦄🦋🌿🌼🌳🗺🔎⚒🔮 on Twitter: "4. Cast/Mold fossil molds: empty space left after organism dissolves. https://t.co/giIVHyT7nw" / Twitter](https://pbs.twimg.com/media/Eb_mY9TWoAA6O3p.jpg)
Avie 🦄🦋🌿🌼🌳🗺🔎⚒🔮 on Twitter: "4. Cast/Mold fossil molds: empty space left after organism dissolves. https://t.co/giIVHyT7nw" / Twitter
![SEVEN WORD CHALLENGE! Write the following 7 words on your paper…anywhere is fine but spread them out. Fossil Mold Cast Index Fossil Trace Fossil Per-mineralized. - ppt download SEVEN WORD CHALLENGE! Write the following 7 words on your paper…anywhere is fine but spread them out. Fossil Mold Cast Index Fossil Trace Fossil Per-mineralized. - ppt download](https://slideplayer.com/slide/17681278/105/images/4/A+fossil+formed+when+an+animal%2C+plant%2C+or+other+organism+dies%2C+its+flesh+decays+and+bones+deteriorate+due+to+chemical+reactions.jpg)