Very interesting ore photos.
A Fire assay is your best next step.
The crushed ore could be tested with a XRF scanner but do not fully trust results.
I see 3 types/colors in the one photo are these panned it water to separate?
Is that free mill gold?
You say electrum, you could dissolve some in AR and then test with Sanious chloride for color indication of Au.
If it is a high Silver Ore there will also be lead present in the mix of metals.
Have you roasted any of it at all yet before crushing, hot quenching will make the ore crush easier, is there a sulfur smell.
In the old day they would open smelt the silver ore in bon fires and collect the slags of silver , sifting though the pile of ashes. This could be done in a well designed burn barrel to keep the hazards of fire contained.
So many Questions to be asked with no answers to be had.