I've taken the advise from Lowlife. Thanks, I've tuned my Minelab SE for coins, gold, and silver. For the gold I used a 10k, 14k, and 18k rings as examples.
I've been searching Liddo beach sporadically for a couple days now and I've found zilch. On the other hand, walkways to the beach have yielded several dollars in change.
I actually got disappointed when I learned the history of the development of this island.
If I don't get lucky and find a recently lost gold ring, I won't find anything much. Oh well, at least the kids are having a blast helping me find treasure.
I've changed my primary goal from seeking gold, too seeking very perfect sea shells

.
So far, I'm doing very well in that endeavor. At my current pace, I could have purchased an old American Chiefs daughter and a prominent place in the tribe in another couple weeks. In modern money I will have some nice keepsakes from my vacation, worth about....nothing. But my kids love them, and that is priceless.