Rainbow Bismuth Crystal Mineral Specimen Home DecorThis is such a unique mineral specimen! No two are the same. It is iridescent all over, shiny, and yellow, blue, orange, green, and even a little pink. It is layer upon layer upon layer! They resemble pyramids a little, but they're colorful! Bismuth mineral specimens are skeletal crystals, crystalline surfaces, and foliation planes that are very well defined, extraordinarily bright, and on a matrix. It is an uncommon mineral that is made up of the