One of them looks kind of lit up in this pic - but I couldn’t find any taken at night:

Sand can be fascinating! Like someone said, the green is likely beach glass. But here is more on various colorful sand grains: https://geology.com/articles/sand-grains.shtml

This was a post to a Dull Men group on FB, and I thought the art was fascinating. The user posted anonymously.

Here is the text of his post:

For those wondering, I do sometimes place my favorite sand grains into the empty molted head cap of small jumping spiders. It’s an obsession, really. I’ve done about 30 of these total. This is a favorite as I love the green color of that one grain. 3mm field of view. I love Bandon Sand!

I’m 44, obsessed with sand and jumping spiders, size 14US and love avocados.

Sorry :(

You can find Nikichi here: https://www.instagram.com/nikichi0922

Some artists have such unique styles that it makes you wonder about the thoughts that run through their heads.

Japanese artist Naoto Hattori is one such artist, as his imaginative pop surrealist paintings combine animals, plants, and more into surreal hybrid figures.

Using a minuscule brush, he paints on small pieces of board ranging in height from 3 to 6 inches.

Source: https://mymodernmet.com/naoto-hattori-pop-surrealism-paintings/

Artist’s Instagram: https://www.instagram.com/naoto_hattori/