Je was op zoek naar: gypsum (Engels - Japans)

gypsum
石膏

i also found a mixture of limestone, clay, fly ash, and gypsum.
石灰石と粘土の混合物と 灰、石膏も見つかりました

now, these crystals are selenite gypsum found in salt flats, but these crystals are arsenic.
こっちはセレン酸の結晶で この結晶はヒ素だ ヒ素？