[YWKON] core crystals but they're not exact diamonds..... like... the shape of a well tumbled rock, that's almost but not quite a square, or a cube, or a diamond, or whatever..... i'm rotating it a lot. EDIT: proof of concept photo
yes this is PARTLY because aera picked up a rock from my treasure chest and said "that's just a core crystal" to me and i think minor natural variation but general shape = diamond (adjacent) is fun...