As this was written ahead of time, I hope that readers have reached 2020 New Year's Eve with some semblance of health and sanity. And I hope that you have gotten something out of my Fall 2020 repeated visitations of "all things related to Arkansas diamonds". This is an example of some advance-homework being beneficial.
An advisory for visitors of online video sites, unfortunately, there are a large number of "self-important commentators" filled with half-truths and "urban legends" as to how diamonds are formed, e.g., from the heating and intense compression of coal. Apparently, they haven't taken the time to study the subject with the wealth of online resources and take notes to improve retention.
Sometimes I try to gently steer conversational threads towards a greater accuracy, but some folks have forgotten the important elements of polite conversation and the civil exchange of information. In other words, perhaps they haven't read any Dale Carnegie lately and some folks don't take advice and suggestions well.
I guess behind the seeming-anonymity of a computer keyboard or keypad, they develop a false bravado. And personally, I don't care about the complex politics and marketing of diamonds amidst the "diamond cartels" of the world. The search for Arkansas diamonds should be informative and fun.
The Crater of Diamonds is a truly unique place and experience worldwide, where common citizens pay a nominal $10 entrance fee and then keep anything they find. With the advent of video-sharing sites, the park may experience high volumes of visitors during certain times of the year and you might need to order tickets ahead of time.
Don't go there expecting to "hit it rich" the first time and finding a diamond on the first visit is probably an uncommon event. If you are lucky, some of the "regulars" might be willing to offer some advice on "where to look and what to look for". As shown in some of the videos, hopefully, the park staff (rangers) will do the same. As you are outside, away from the noise of TV, radio, and the computer screen, it can be a place of relaxation if done properly.
And I would advise any aging Baby Boomers to take it easy, hydrate, and go during times of the year with moderated temperatures (preferably after a heavy rain).