Satiny shimmering sparkler that shifts greener in the kiln. Heavy XXenon is quite opaque (and exxtra sexxy!!) Heavy Xxenon can bloom with a light blue haze, especially where encased, like our Green X. The usual cautions for an aventurine color apply: limit long hot garaging and encase with care. Heavy Xxenon has been successfully encased and imploded, but we feel it is best suited for surface work.