This is going to be a long one, but I gave you steampunk Rose.

Rose Quartz is the most common gemstone, and Rose Diamond is the least. We've established this.

But here's the thing...

Pearl is formed underwater.

Amethyst is formed in caves.

Opal can be found in underwater   caves.

Ruby contains high levels of Corundium.

As do Sapphire and Garnet.

Rose Diamond is rare.

So is Bismuth.

Rose Quartz is common.

I support the fusion, but wouldn't  that  be breaking a cycle? Let's just say this is Canon.

Rose Quartz, isn't Rose Quartz.

And the gems know it.