I set my pyrex dishes out on a shelf as close to an overhead ceiling fan as possible. Some of the gooier stuff can take awhile to crystallize. It's mostly the oils that take so long to dry out and crystallize.
I've never used silica to dry spice so I have no idea how that would go. My gut says don't do it on the off chance that the silica might come in contact with the solvent.
What I would do, is try to redissolve everything into some heptane/bestine (you could also use naptha too but heptane is generally preferred for re-xing) into something like a test tube... tall, skinny and cylindrical is what you're looking for.
Once you've got everything dissolved in your test tube or whatever, you'll probably have two distinct layers. One of cloudy heptane and one on the bottom with some goopy looking stuff.
Decant the top heptane layer and freeze precip or evap
slowly for beautiful crystals. Look into some of the re-x techniques in the advanced chem fora.
With the oil, I'd dump that out into a largish pyrex and do the fan thing some more. The more surface area you give it, the faster it will dry.
This will give you two different kinds of spice and both are amazing.
Don't forget to wash out your glass/evap dishes with some alcohol after you've collected the majority to get those last few mgs. that would otherwise be lost.
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