It's based on everyone who hides their emotions from others because they're ashamed of how they feel or don't want to be a burden on them. The song is pretty much saying don't worry, let it out, let us know, we've all been there or will have to face something similar. Everyone has a crystal teardrop, an emotion that they just can't hide form everybody, someone notices and can see through the cover up. "Take it out of your pocket, wear it proud on your neck" no one is going is going to feel content 24/7, so why hide it? Why not expect to your friends to help? Keeping it in will only make it worse the next time.
Crystal Teardrop
Look around
You’re not the only one in this store
We’re all buying the same things
Chosen by all of our errors
The only difference about them all
Is we have different colors
Grab a few more for the road
It’s tough, but don’t let it go
But that doesn’t mean
That you are alone
In this mess
Take it out of your pocket
Wear it proud on your neck
So we can see through
Your crystal teardrop
Frozen in time
You still use it
Have it to define
All that you are
Don’t you be ashamed
We’ve all been there
And we’ve all felt the pain
Our rivers flow through the same land
But our tides are never level
And neither are the temperatures
But you can be sure
Whether its blood
Or the tears that you have cried
We won’t allow a drought
Our rivers will survive
But that doesn’t mean
You should hide alone
From this life
Slowly open your eyes
You need to a have good view
So you can see through
Your crystal teardrop
Frozen in time
You still use it
Have it to define
All that you are
Don’t you be ashamed
We’ve all been there
And we’ve all felt the pain
Don’t let it take over you
Don’t let your body become a diamond
But please stop trying to hide it
We can see
Not just from our experience
But by the way you clench your fists
We see the red in your eyes
Just cry
Just cry and let it out
Just cry and let it out
Just cry
Just cry
Crystal teardrops
Just cry