About Crystals and transformation...

Today I traded off a Beautiful Large Carpet from Pakistan for 2 large and similarly beautiful pieces of quartz

1) One is a clear quartz cluster of approximately 10 kg;
2) The other is a massive Twin Smokey Quartz of approximately 25 to 27 kg, with a base of 20 cm and height of 40 cm. (original picture not available yet but similar to the Google Image here below)

I'd appreciate any comments or specialist clues on the properties of Twin  Quartz Crystals and Smoky Quartz in particular. As my knowledge on Crystals does not include Twin Crystals ....

Beautifully and gratefully yours!