Batches can definitely vary in "shockiness" Fremen used to be my go-to turquoise but my last batch was impossible to use. If there are colors that I want but have had issues with I will order them from Frantz with the note not to pull any rods larger than 6mm diameter. They have been very accomodating and I have found that using the smaller diameter makes a difference- perhaps fewer hidden inclusions/bubbles?
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