I made this big green resin and glass crystal for aquariums, fairy gardens, paperweight, or just a cool decorative item to have around. The glow in the dark adds that little extra flair that makes it a must have. The colors all come from scrap stained glass I purchase from a local shop. The glow is from a non toxic powder, and the epoxy resin is fish tank safe. I make glowing mushrooms and at one time jade 30 in a 30 gallon tank for a year with no ill effects. The crystal measures 2 1/2 inches tall by 2 inches wide. Thanks for looking!