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Alien Crystals are a kit that allows you to create soft glowing rocks. These are the same rocks that can support the growth plants.  This compound is used as a soil amendment in the Southwest to retain water in sandy soils. It can be used to grow potted plants, without any additional soil.  They will glow for up to an hour.  It is currently on the market and available for shipping!

$7.50 plus S&H