Don't you just love the English language? That something spelled in a completely different form can rhyme? That we've taken a written language and used it to create such lyrical structures which can bring such pleasure to read? And people are constantly trying new ways to make them different, playing with new word usage and descriptive patterns and so on and so forth. There really is no limit to our creativity because there's a barely visible limit to our language; it seems to go on forever. It's an exciting thing to ponder.
My goal with the two comments I've written today was simply to make sure all your older pieces had at least 2 or more comments on them. I have to admit though that I've never actually written a comment on a Personal Quotes submission before. I'm wondering if you're making a point here on pressure yielding valuable results in a symoblic way using the metaphor of jewels and fossil fuels, or whether it is simply a straight comment on how nature can create such precious commodities. Because if it's the symbolic thing, I'm not sure if pressure is necessarily such a positive force. I tend to relate pressure to stress and I immediately get a visual image of boiling water in an airtight container, shaking and vibrating until...BOOM. It explodes. The other 'pressure' your jewel image gives me is being buried underneath the weight of a mountain, being crushed, flattened, unable to move, trapped. It makes me feel fairly panicky if I'm honest. But despite that personal view -- and it is just a personal take, I'm probably a closet claustrophobic or something -- this is a punchy little quote. I don't normally like to see exclamation marks, but it works really well here. And I do like that little jewel/fuel rhyme.
Having a look at the rest of your writings, you seem to like them short. Although this makes way for much overuse of the "short and sweet" cliché, short poems are harder to pull off in the sense of meaning and depth. However really good writers can and will pull it off easily. This one definitely came out of the head of a good writer :) Cheers! Azuire P.S. Love the ending.