u/sweetrollinwhiterun

I bought this from a collector who said it was hematoid quartz. I’ve seen similar pieces online labeled as “chocolate calcite specimens”. I don’t know the locality. The rust-color comes off on my fingers if I really have my fingers rubbing against it, like a light powder. The bottom sort of looks like calcite. I tried looking on Mindat for any info on this but I can’t find anything.

What is it specifically? Please help. It’s one of my favorites in my collection.