It's a typical microcline twin with small included angle butt. The bottom rock is flower like albite, symbiotic black mica and smoke quartz, the classic combination of Fujian!

Our Mineral crystal Shop at Shantou,Guangdong,China
We can offer all kinds of chinese mineral crystals by wholesale or by retail.You are welcome to contact us in free time!
When in China, please come by for a visit. I would be very happy to meet with you!