Correct the judgment of some meteorite field friends on whether it is slag and meteorite

Recently, it has been found that some star friends mistakenly judge the slag in industrial production as a rare glass meteorite, and some people encourage it to "point to the deer as a horse".

Therefore, I uploaded a few pieces of industrial slag I collected (note: a few colorful slags are too large in size, I didn't bring them back, the colors are blue, green, brown, rose, black and mixed tones, etc., the cross-section is glassy, with the characteristics of reflecting light), for Xingyou to study.