biologist frank rudolph knows all too many stories like that of good samantha and has written a book advising pebble collectors on what to watch out for. it's not how it was a 1st time this here is a harmonies piece of flint this is. the biggest danger to the public is confusing amber flint and phosphorus only experts can tell the difference just by looking. amber and phosphorus feel the same and have the same weight. for force but fast for us is exceedingly dangerous because it's self ignites at around $20.00 to $40.00 degrees celsius and once it reaches our body temperature it becomes liquid and ignites. so instead of a stone you can remove from your pocket all you have is this slime on your fingers after taking a. serious problem with this phosphorus is that back then it was mixed with rubber the idea behind incendiary bombs was that they drop through roofs and into the buildings and then a small explosive charge was enough to spray the phosphorous across the walls and even the rubber was added to make it stick leading to a cluster of small fires. because i took papers out of my p