The opaque brown tones of River Rock vary in intensity depending on how it is worked in the flame, ranging from a pale bone shade to a deep mocha color. Streaks of lighter colors form on the surface of the glass after is has been heated, creating interesting organic effects that mimic stones such as picture jasper. This color looks nice layered over black and encased in clear. Repeated reheating in a neutral flame can cause the surface to strike to a variety of earth tone shades with areas of silver speckling. Layering this glass over Dark Ivory will produce a variety of organic effects. Reduction flames will bring the metals to the surface of the glass.
Sold on Ebay in 2005.