How big is this shell in length and width? Also, can you show a picture of the inside? (If one were to buy this to make, say buttons or other things, they would like to know how it looks on the (shiny) inside. PS one can always plug the hole in the 'conch' shell and make a horn trumpet or it can still be generally used for decoration. [It's possible that a squid, octopus or bird (gull, perhaps) came across the tide-beached shell and ate its occupant, first killing it by digging through and piercing the shell, causing it to release its muscular tension and exude out of the mouth of the trumpet thus being available to a sharp beak.] Nature is not anthropomorphic; it is cruel, fair, and indifferent to any particular individual.
I tried to add this before but it didn't show up: Divers, who harvest the conch mollusc for food, break a hole in its shell (to which it is attached by a strong adductor muscle used to retract rapidly into its shell for protection) and insert a knife blade through that to release the snail. Conch are born as larvae with a tiny shell to which they are attached and continue to build larger with secretions as they grow. They keep their shells throughout their whole lives.