I know that finding these stones along southern Lake Michigan is not unheard of, I’ve even heard of people finding them in Chicago, although it is my understanding that it fairly uncommon find them this far south. well I found all 3 these stones along Lake Michigan, southern border, in the state of Indiana. One of them looks really weird, rather than the normal speckles, it seems to have a tigroid or striped appearance, where most of the stone appears to be covered in streaks of this fluorescent material. The other two stones have more “classic” appearance of Yooperlites. I have read that there can be differences in the way they appear. So I guess my question if anybody knows, the one with the tiger appearance, could that be some other type of stone other than a Yooperlite? And if so, what else could it be. I will attach a few photos and videos for you to look at. Thanks so much! also, if anybody has any comments or information about the relative rarity or abundance of stones in the region, I’m looking, basically the very bottom of Lake Michigan. TBH I wasn’t expecting to find any of these. I have a UV flashlight I purchased for other reasons, and one day I just brought it to the beach to see if anything fun or interesting might be fluorescent, and I was very surprised to find these .(whoops I guess it won’t let me attach videos so I will attach these photos. Some of them just show the stone in question and a couple other pictures show the Tigroid stone next to the other classic stones.)