Vintage stole pattern

Here is a close up of the vintage stole pattern I have been testing. I like this pattern quite a bit, but would pick a smooth merino or alpaca to make it up, so that the texture and laciness could really show through. You will notice that I have pulled the needles out; while knitting away in class last night, following my original intention to make this up as a narrow scarf, I noticed that there was a foam core and not much yarn left on it, rather than the deceptively plump ball of yarn I had started with! I have seen this "trick" once or twice before, and wish there was a way to know in advance if that were the case. I would not buy a yarn that employed such a device intentionally, partly because the foam doesn't biodegrade, and partly because I find it misleading. Well, I ripped out the work and will make a narrow scarf or save the yarn to put with something else.