JCK 5: Tips for Dealing With Lead Glass–Filled Rubies



1. Have the right tools. Keep a Hanneman filter—or, at the very least, a loupe—on hand to inspect stones.2. Know the telltale signs. Look for flashes of blue and gas bubbles in stones under magnification.3. Keep reliable resources handy. Have a gemologist or laboratory at the ready to help ident

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