silver tarnishes when exposed to air
so keep them in little baggys

Yes. Sterling means 925parts/1000 pure silver. Hill Tribe Silver is a higher grade though.

I am not very familiar with the Pandora bracelets, but I believe you can use a omega chain (that may even be the chain style they use, however, not sure on that). Look at the size of the chain (diameter) and the size of the hole for the beads that you want on the bracelet. If the chain is 2mm and the bead has a 3mm hole, it will fit on the chain. Sorry, I couldn't be of more help. I hope this helps though. :)

I store my metals separately. Silver tarnishes anyway so why take the chance. Also, I need to keep my SS findings separate from silver plate items for pricing reasons.

To use an open cone to to finish the ends of a multi-strand piece of jewelry, attach all of the strands to a loop in an eye pin. Thread the eyepin through the large side of the cone, so that the loop slides into and all the ends are hidden. Make a simple loop in the other end of the headpin, and attach your clasp.

You can make your own extender chain by cutting our bulk chain by the foot into 2" increments using a nipper tool. You can also add a bead on the end for some added flair using a simple loop or wire wrapped loop.

For beads with a larger hole, we would recommend checking out our silver-lined Venetian beads:
http://www.artbeads.com/venetian-glass-beads-silver-lined.html

or the CRYSTALLIZED™ 5041 Faceted Large Hole Roundelles:
http://www.artbeads.com/swarovski-5041.html

If you have any questions on the hole size of a bead, you are more than welcome to contact our Customer Service department with the product code for the bead and we can measure the hole size for you.

The stainless steel wire is coated with a "clear" nylon coating.

Some of the bead caps state their size in mm. They fit that same size bead.

If, like me, you're frustrated that not all the bead caps show mesurements...try this...select one of each of the styles you like. Keep them in their Artbeads.com bag with the item number. Then when you plan a project with bead caps, go to your stash to find the perfect fit by trying them (in person) on your beads. Place an order for the specific caps you need and in no time...you're swanky caps fit your fab beads!

Based upon my experience with pandora style bracelets, the girth of the chain appears to be about 3mm in size. I would suggest selecting beads that have at least a 4mm size hole or larger or search for what's called "large hole" beads. Hope this helps.