The Coal Creek Serpentine Prospect is vivible from space as a splash of bluish-green in the endless miles of pink granite and gneiss of the Llano Uplift. It is located just off the Willow City Loop, about halfway between Llano and Fredericksburg, Texas. One of the oldest rock units in the state of Texas, it is composed chiefly of calcium magnesium silicates with large amounts of magnetite, chromium and nickel. The serpentine exhibits a wide range of colors. Green, blue, black, brown and even orange and red varieties can be found here. Nearly all of the serpentinite from this site is strongly attracted to a permanent magnet due to the high chromium, nickel and iron content.
Other minerals found here include crysotile asbestos, soapstone, talc, actinolite, tremolite, chromite, apatite, vermiculite, chlorite, quartz and zaratite, a bright green nickel carbonate. A wide selection of minerals are found in Coal Creek itself, along with native American artifacts such as arrowheads, scrapers, drills and slitting blades. Coal Creek is a very popular rockhound destination.
Warning: The site is rugged, with fall and water hazards.
• No climbing on rock walls or collecting near cliff edges
• No swimming
Coal Creek Serpentine Quarry
Serpentine found at Coal Creek