Amethyst

The Amethyst is a jewellery stone and gem from Secret files tunguska.

You have to combine the Flask with stone with the Acid flask, this separates the amethyst from the stone.

Task
The amethyst must be later combined with the Diadem, to produce the crone, put this at the lamp and light the plan to find out the code.

What Nina says
"The light is refracted a thousand times in the amethyst. It's beautiful - no idea why my father didn't remove it from its ugly stone encasement a long time ago."