These Crystals began singing in harmony with a magical Epic Green Crystal that was carrying Faery Baby Twins. They are all twins (or twinning). They have inclusions of rainbow coloured sparkles (very rare--it's the only time I've ever seen crystals like this). They are also Lightning Struck Crystals. Each one kissed by the fire of electric energy in some way. You can see the lightning marks on some of the crystals, but some have been long healed.
I will listen for one Faery Light Twin Crystal for you.