Can we please post good sources for clasps? I'll start:
Rio Grande
Bella Findings
Kimarie Designs
pearl vendors like Pearl Paradise, The Pearl Outlet, etc. also sell clasps by themselves
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Yes! This can happen; the awl is a good solution. I do keep the threads parallel and untwisted as much as possible. I keep a straight pin handy to use to slip in the loop like you do the awl, Hanadama. (Those silver pearls are something else!!!!) For me it's always those tight ending pearls and I'm holding my breath~
Great photo, Pearl Dreams.
This old embroiderer's trick has helped me with the twisting: Periodically when stringing and/or knotting, let the loose thread drop down and hang free, with the needle at the end, toward the floor. Allow the needle and thread to dangle for a minute or so, nudging if necessary, to allow the thread to unwind any tension and twist it's acquired. Do this every so often as you go along. Won't help with twist added as you go through the last few pearls, but it's amazing how much twist thread can gather even just in stringing beads.