Crystalline material/Sap on rafters

An otherwise pretty clean attic space seen in Ontario, Canada but not sure how to explain the crystals. It appears to be dried sap but had not seen this before
Any suggestions.
Photos attached

John Arnott
Welcome Home Inspection Services
Guelph, Ontario

Yeap, it happens. Mother Nature and all.

it’s sap crystals that have been extruded from the wood due to high attic temperatures. We see more of this sap staining when the wood used for framing was not kiln dried before construction or the attic has ventilation issues. Otherwise it’s harmless and never makes it in my report.

Will become valuable amber gems in a few million years