This is what you call a hidden gem

Honestly what did I expect when I went into this show? I thought it was going to be a boring show with some mineral facts that I will probably not care about and be more focused on the CGDCT aspect of it. And hey, base on the character design, you can't really blame people for wanting to check out Nagi...

Nagi
I don't need to show the main reason why most guys would be interested in checking this one out but hey can you blame them? But apart from just her physical features, which are nice, it's really her knowledge and composure that sets the tone of the show. She's the well rounded and grounded character, that senpai you can count on. Someone that is easy to admire and make sure we stay on the right path. Even if the original reason you came to watch was for her, you'll find yourself slowly grow more invested in the show as it continues on.

Ruri
Off course the show is called Ruri and honestly at first she came off as a brat but you slowly see her just being a kid who's found a hobby they love and that's good.
I think Ruri serves as a good place for many young folks as they venture into adulthood... what is the next stage in my life and what steps I need to take to get there? And some are still trying to find that passion and dream of theirs... because as a child, you only wanted to have fun and I can tell you as a adult... your idea of fun isn't the same as it used to be. And Ruri captures that perfectly, where we wish we can keep that feeling going just a little longer. But the sad reality is that nothing last forever, not even diamond.
Ruri manages to captures that aspect of where many people are in life and even as a adult, sometimes you think about these things too as you go from one career to another. No one has the answer to everything and just as rocks... they move and change base on their environment. This is also true of us as well. You may be at the same place all your life but others around you might come and go and the environment around you also changes as well. And it can be scary to explore unfamiliar places and trying to see changes is also scary too, because we are so familiar with the life we have. But the beauty of it is, to see new things we might have not if we never are willing to explore outside our little world.

Imari
She's the bookworm of the group but I really enjoyed how she slowly ventures out with the others. She's introduced as the one who only ever study about the rocks on paper. It's like people who ever only explore the world through the internet but never taking a step outside of their house. Imari captures the idea of the world is best to experience.

Shouko
Like Ruri but someone who is more aware of what she wants, but with her introduction we see another whole story. Where her parents laugh at her dream as a hobby. That knowing it doesn't offer much money and doesn't pay well, they want her to pursue something else. She represent the one that follow your dream regardless of what others think. It's not about the money you make but the passion you have for the job, because it won't feel like work.
I really love her character and her introduction to the cast. I think having another person, especially one who contrast Ruri was a nice addition. She was never in conflict with Ruri but another driving force. As she's someone who finally see that her dream can be real and she is taking the steps necessary to get to the next stage in life.

There's so much more I can say about the characters as they truly carry this show and they are gorgeous in design. But what truly rocks about this show is the knowledge behind everything. That the world is a every changing place that what we see now, what was it like years ago or will be like years from now? How will the world change in the next 100 years... we will not know that answer but it's fascinating to think about what it will be like.
As the world is ever changing, we continue to learn and explore and see the ever changing world. We see all that it has to offer and we have yet to truly grasp everything it has to show us yet. To think how small we are in this world and all the beauty around it.

It's a really slow show with a ton of information, but never once did I find myself bored. I think this was a great show that kept me invested and I loved it. The animation of the rocks were so great, to see how they look and makes me want to go out and find some minerals myself. To see how many things we cannot see or understand with just our naked eye. To see the beauty all around us.

It is a nice challenge for us to take a step outside of our room and touch some rock.