Talk:Transcripts/Secret of My Excess/@comment-67.194.72.152-20111215014331

"It's a fire ruby! I've been aging it for months, and it's almost ripe! "

As in "aging wine." Minerals seem to grow by themselves when exposed to air(rock farms?), so Spike may have controlled the growth of the initial core by putting it into some kind of mold. Also, Spike may have fused some smaller rubies into a larger core with his flame, which means that the ruby may be partially synthetic.

In any case, he has put a lot of effort on that gem without expecting to give it to someone, which makes "giving his heart to Rarity" more d'awwww...