translucent rock from Philippines

[meMiner]

I was sent a few pictures of some rocks that a fellow in the Philippines collected. He asked me about the kind of rock and value. I am still scratching my head over the first question. Some on this forum are much smarter than me and I would be interested in hearing your guesses. I have asked for more info such as streak and hardness but I think he would rather just mail me a few.
I like free stuff, but hate taking advantage .. by either getting something really good without compensation or having him waste his money (shipping something that is not worthwhile).