"exhibit a play of colors like that of an opal; \"This nitrate opalesces under certain conditions\""@en-us . "0"^^ . . . . "0"^^ . . . . "202734140"^^ . . "02734140-v"^^ . "202654085"@en-us . . "opalesce"^^ . . . . "201888939"@en-us . "opalesce"@en-us .