> Actual diamonds have occlusions, slight color shifts, unique sparkle patterns

All of which can either be recreated in a lab now, or are likely to be possible before long. See for example synthetic star sapphires.

> I like rocks and minerals

Good for you, so does my step-dad (he's a geologist). The man was a nightmare to try and drag around the New York museum of natural history, I thought we'd never get out of the mineral section...