How long will crystals in a sealed jar last

[fetty411]

It has turned brown. Is it still usable? Does it have a shelf life

 

[fetty411]

Forgot to add image

 

[somanaut]

still usable, just a bit oxidized and gooey. getting toward the end of its shelf life, time to get high

 

[Transform]

Forgot to add image

The discoloration will be superficial if it's oxidation; on closer inspection it seems more like localised areas of polymerisation, since some of the surrounding crystals have remained perfectly clear. It's hardly worth doing a clean up (re-x or mini A/B) on what looks like a tiny amount unless you want to practice your skills in handling small quantities of material. Even then you'd be losing some to residual saturation of the cold naphtha.

How does the stuff smell?