Coastal Plain chert. Left, two examples of Flint River material, Dougherty County, Georgia. Right, two examples of Brier Creek/Stony Bluff material, Burke County, Georgia.
Orthoquartzite, Burke County, Georgia.
Two common varieties of Ridge and Valley chert. Left, probably Knox chert, Gordon County, Georgia. Center and right, Fort Payne chert, Floyd County, Georgia.
"Mustard chert", probable Fort Payne variety, Floyd County, Georgia.
Jasper varieties of Piedmont chert. Left, two grades of material from a single locality, Oglethorpe County, Georgia. Right, example from Oconee County, Georgia.
"Daltonite", Washington County, Georgia.
Probable hornfels, "457 material", Greene County, Georgia.
Little River metadacite showing fresh material and cortical surface. Lincoln County, Georgia.
Metadacite projectile point (artifact), Richmond County, Georgia. Photo courtesy University of Georgia Laboratory of Archaeology.
Vein Quartz. This is an example of the "milk glass" (type 3) variety. Photo courtesy University of Georgia Laboratory of Archaeology.
Nottely Lake Quartzite/Mylonite. Cortical surface is visible at right. Union County, Georgia.
Quartzite (metaquartzite). Pine Log Mountain area, Bartow County, Georgia.