These emerald crystals are from Swat in the Swat District, Khyber Pakhtunkhwa, Pakistan. This District contains a wide variety of minerals including the gemstone emerald. It is the green gem variety of beryl and it contains the elements Be, Al, Si and O. This piece consists of a schist-like matrix that contains a cluster of complex multi=terminated crystals. They have a rich chrome green color and they are mostly translucent under bright light. The emerald crystals are approximately 27 mm long. This piece measures 2 1/2 x 1 3/16 x 3/4 inches or 64 x 31 x 19 mm.