Amber Spyglass Device - His Dark Materials Glossary | OpenFiction
Amber Spyglass Device
Object
A viewing instrument constructed by Mary Malone using lacquered seed-pod sap, allowing her to see sraf with the naked eye. The device works by coating a lens with the amber-coloured resin from the seed-pod trees. Through it, Mary confirms that sraf is flowing away from the world at an alarming rate.