For anyone who already collects them that is already considered an appreciation, however AI chimed in with a great answer that I would like to share (in short) and maybe for some of you it already matches your own reason.
“Studying rocks and minerals can help you appreciate the natural world’s beauty and complexity. You can learn about earth science, chemistry, physics and math and gain insights into the planet’s history, the evolution of the solar system and the presence of life in extreme environments.”
If that was not deep enough, then one could think about the value it gave and continues give to society, such as the development of new technologies. As a matter of fact one of the movies I watched entitled “Life’s Rocky Start” a 2016 PBS/NOVA film related the development of life on earth in relation to mineral processes and changes in the past.
Having worked in a rock and mineral museum some visitors would talk to me about how certain inorganic rocks and minerals were toxic. Some minerals you might appreciate being aware of, but they’re not that common and remember that organic plants and animals can be poisonous/ toxic also.
Despite all that, I appreciate the fact that no single rock, mineral or crystal is ever exactly alike and as one person once told me – each one seems to have something special (kind of like the uniqueness in every person, tree, plants, animals and so on). So why not have them as jewelry, decorate our houses, collect them or study them. They are still finding more new minerals as a write this.
Some of the very best ones are the ones you find or discover for yourself. As a matter of fact, some places can produce similar gemstones, but move to a different place in the same area and you’ll find something completely different. Take for example, fire obsidian found in Oregon.
Below is my favorite rock that I found, nothing fancy, but to me something special. So I hope you all continue to share (also with your rock clubs) why you love this wonderfully diverse hobby and follow you hearts.
Finally, I would like to say please support your local rock shows as much as you can. Appreciate those beautiful displays. Because if we don’t, they just might not be there in the future and that would be very sad, not to be able to share what you love.

