I used to think hand signals were outdated and just relied on the radio. Then this new operator showed me how clear signals stopped a mix-up when the radios got fuzzy. Now I use them every day, and it's cut down on confusion big time. Talking with him made me see how simple stuff from others can really help on the job.
I was in Mumbai for a jewelry fair a while back. A local guy I met said he knew a great gem dealer. We went to this hidden shop down a narrow street. The dealer showed me these bright blue stones he called rare sapphires. Under my loupe, they were clearly just colored glass. We all had a laugh when I pointed it out. Now I never buy gems without testing them first, especially when traveling.
