Space Age Crystal Growing Kit: 6 Crystals (Amethyst and Diamond) Grow your own gorgeous crystals with the Space Age Crystal Growing Kit: 6 Crystals (Amethyst and Diamond) 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 amethyst and diamonds. Crystals take a few days to reach their full size. Fun and fascinating, this kit is an excellent gift for the budding scientist in your life. For ages 12 and up - Instruction booklet included