It is called "skeletal" quartz by those that come to dig for it in Abbeville Co.  It might be called "artichoke quartz" in other parts of the world.  I would say it's a hybrid between the two.  The reason I love quartz is because of the sheer diversity of habits and growth forms.  Diamond Hill is known for producing an abundant variety of these quartz colors and shapes from bone white "skeletal quartz", or "snow flake quartz" (my own name to the specimen growth form below) to deep glassy facet grade smoky crystals, to scepters, enhydros, quartz epimorphs, to the beautiful and large purple amethyst crystals Diamond Hill is known best for.