Question about Artifacts in the Mine

Ok,
When I dig for ore there are many blocks that don't get "uncovered". Mostly because who has that many mining tools, really.
So, now that I built the Central Museum it's cool that during the quest for ore the occasional artifact will appear. Yeah!
My question is... let's say that one of those "un-highlighted" blocks that I chose to pass by contains an artifact that I am totally unaware of.
Doesn't seem quite fair that should be the only time it shows up.
Does it "cycle" back later? Or is it 'if I miss it I'm screwed'?

Sweet!

Don't worry.  The artifact will keep regenerating at future mine levels until you collect it.

If you have the tools, I find I miss very few blocks after been given this tip

Use a hammer as far right or left as possible on the first and second if there are no gaps.
Then use a dynamite to take out the second row.
This will show you what is in the first, second and third rows.
Now repeat every middle of three rows.

Good luck

@Cuddz. That is what I do. Reminds me of a bubble sort. Gave me flashbacks to my pascal days.

Another strategy is to save your mining tools until it is two days of Ore Galore; then use a couple See the Light boosters and dig like heck. The bonus comes when you have saved/used more mining tools to descend for a Mine Time event win and increase your Champion Mayor win count. This is the easiest way to win a mayors' competition and you will be smelting ingots (and upgrading factories, etc.) for weeks even when using the Efficient Smelting booster. Trust me. I am still working with the ore from last time.