When you have a guest over, you give them a geoduck because it's worth a huge amount. You're nothing if not a hospitable host.

This kanji, weirdly, can also mean picture frame or forehead. Why? Who knows. Just imagine going to a museum and seeing a geoduck in a picture frame, and scratching your forehead in confusion because it's supposedly worth a vast amount of money. Modern art, am I right?

The geoduck you gift to your guest is worth such a lavish amount that it makes them gawk (がく). Everyone gawks when they see a geoduck, really — first at how weird it looks, and then at the amount it's worth.