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So yes, I went fossil hunting for the first time with two friends two days ago behind my friend’s grandma’s house in some farmland and we had a blast finding fossil shells of echinoids and gastropods and whatnot. Before we left though, my friend’s grandma gave us this really well preserved fossil of an echinoid (at least compared to our finds) and asked us if we could perhaps find out how old it is. I tried to do some research on the web but its an absolute maze but I stumbled across this forum. So im hoping that through identification, we’ll be able to find out about how old it is because i feel like its the least we could do for my friend’s grandma who entrusted us with this amazing fossils of hers. Anyways, imma get straight to it now. Its was found in some farm land which has some sedimentary rock underneath all the soil. The excavation of this rock to till the ground better has created quite a few piles of this rock here and there which also contain fossils of sea snail shells, some really round looking clams, and echinoids just like the one in the pictures. The rock surrounding the fossils are a really light orangey color and is really easy to chip at or scrape. Probably limestome but not sure cuz im still new to this. This is all located in the Philippines up in the mountains on the island of by the way. It’s 13.5 cm across what I believe is its “front end” to its “back end”, 11cm wide, and about 3 cm tall. Again im new to this so if there are any details that still need to be mentioned or if some additional pictures are needed, please ask because I would feel really bad if i didnt grant this sweet old lady her request. T^T Any info about how old it could possibly date would really mean alot but other info on it would be really great too ^-^