Smoky Quartz

As a small child, following along behind my grandfather while he plowed with the mules, I would see this old field stone.  Later as I hunted game and arrowheads, I stepped over this stone.  Little did I know what treasure lay within.  Last week, I picked it up and brought it home.  After busting it apart, a vein of smoky quartz was revealed.  The large arrow head is the beginning of that vein and I hope to get many more knapped out of it.  I am not a rock man, but I think it is quartz, since it is translucent.