My indoctrintion included many questions, so I hope you don't mind. So, you say it is translucent. Is it opaque?
Second question: Is it very hard. I am going to assume it is not. If you can scratch it with a knife or a nail file, it is under5.5 on the Mohs scale.
Nothing I could find matched but some questions will make it clear. It could be beach glass, a guess, but not unlikely. The weathering makes it difficult.