Gems trade in Juneau, Alaska

Do you know anything about gems trade in Juneau Alaska during cruise season? (May-September) One of my customer said she was there and sold a number of my emeralds she won on eBay for about $80 per ct for $500/ct and jewelers said it was a very reasonable price. Sounds strange: she is not in business and jewelers rarely buy anything from the people from the street. If you have any information (in particular - where to go in Juneau if it is true), I’ll greatly appreciate it.