When it comes to graphene,the source of the graphite is of utmost importance.No flake stuffs can match in comparison due to stages of processing.

Vein graphite is available in sizes ranging from 8-cm. lumps to powder as fine as 5-micrometers. Products covering the range of purity from 94% graphitic carbon to 99% graphitic carbon are commonly available. In many applications vein graphite may offer superior performance since it has slightly higher thermal and electrical conductivity, which result from its high degree of crystalline perfection. Vein graphite also has the highest degree of cohesive integrity of all natural graphite materials. High cohesive “energy” means that vein graphite is easy to mold and can be formed into solid shapes without the aid of a binder addition.

And the Albany graphite contain the highest degree of crytallinity,even higher than the graphite from Sri Lanka. according to Dr. Ian Flint.