You're a What? Gem Cutter For eons, geologic forces worked to form pockets of mineral deposits that dot much of the globe. For millennia, artisans and craft workers cut and polished certain kinds of these minerals, transforming rough, rocklike crystals into stones of beauty and brilliance. And for about a decade, Dave Brackna, following in the footsteps of artisans of old, has crafted countless carats of rubies, emeralds, and other stones--worth nearly $10 million--into gems of the ...