I’m ready to change my mind the day good, solid, replicable evidence comes to light.
What would it take for you Daniel to change your mind about the things you believe in?

Some crystals have useful properties that are exploited in very specific, very scientific ways: the piezoelectric effect of quartz is used in various electronic components, the hardness of diamonds is useful in many mechanical processes, various liquid crystals have become extremely popular for displays, etc.
There are loads of real scientific papers, loads of replicable experiments, loads of independent confirmations that prove that all of these properties are real and useful.

The fact that these crystals have specific physical properties does not imply any usefulness as a medical or ‘well-being’ remedy: because quartz produces electricity when subjected to mechanical forces doesn’t mean that putting one in a bottle of water will do anything to clean that water.
The abuses and confusions of scientific language are the hallmark of pseudo-science: they brandish words like ‘vibrations’, ‘energies’ and ‘quantum physics’ as if using them was enough to explain anything: where are the actual explanations why any of these would actually be relevant to their claims?
Where are the replicable experiments?
Where are the statistical analysis?
Where are the falsifiable theories?
Because something has certain useful properties that can be exploited in specific circumstances doesn’t validate any claims outside that narrow field.
Similarly, “cymatics” has nothing to do with any of the health claims made about crystals: because something vibrate at an atomic level (everything does to a certain degree at normal temperature) and because there is a field of science studying wave patterns (cymatics studies waves and that are caused by vibrations made at a level a few order of magnitude higher than that of atoms) doesn’t validate any of the ridiculous claims made about crystals.

It’s exactly the same thing as saying that because potatoes are tasty when fried then they must be excellent building material.
Total nonsense.
By the way, crystals certainly don’t produce ‘powerful electromagnetic fields’ on their own, so putting one next to your computer won’t do squat; also because silicon is used as a base material for making microchips doesn’t mean that putting one on your forehead will make you more clever or improve your memory.

All it would take for the crystal enthusiasts to actually prove any of their claims without the shadow of a doubt would be to publish test protocols in peer-reviewed scientific publication and have these findings replicated and confirmed by independent scientist, just like the rest of science does.
Instead, new-age proponents just like to talk metaphysical non-sense, abuse scientific language and concepts and provide no replicable proof or propose no actual explanation based on anything meaningful.

Daniel, if you are really interested in science then get a grasp of the scientific method to analyse these claims, you’ll see that it’s very powerful and helps a lot in separating what has merits from what has none.
It’s not a matter of open-mindedness vs narrow-mindedness, it’s a matter of deciding if a claim has merits or not based on actual hard evidence.