This is so cool! Many years ago, I bought a large lot of smoky quartz crystals that I used to give to others who needed positive energy as well as for placement on people's property who felt they needed good juju on their property and in their home. I love smoky quartz, so I kept two of the rough stones and put them in my bowl with smaller stones I keep.
Last night some friends were over, and I was digging through my small bowl looking for an appropriate stone for one of them when this caught my eye. I've seen this stone hundreds of times over the years and never given it much attention. Last night, however, I realized it had an aquamarine crystal embedded in the smoky quartz.
The moral of the story: pay attention to your crystals - they may contain a bonus.