Space Age Crystal Growing Kit: 6 Crystals (Emerald and Ruby) Grow your own gorgeous crystals with the Space Age Crystal Growing Kit: 6 Crystals (Emerald and Ruby) from Kristal Educational. Prep the growing solution and watch as dazzling quartz crystals begin to bloom. For detailed instructions, please refer to the included booklet. Each kit grows two crystal clusters, two geodes, and two single crystals in shades reminiscent of emerald and ruby. Crystals take a few days to reach their full size. Each kit contains crystal-growing chemicals, crystal-growing containers, stirring rod, and 48-page Space Age Crystals booklet. Additional items may be required. For ages 12 and up - Instruction booklet included