These lovebirds are carved from Mexican Onyx. The colors are natural, as are any other shadows, inclusions, what-have-you that you see. The birds are 4 inches high and the agate slabs measure approx 3 to 4 inches long. If you're not 100% pleased with your purchase it may be returned. Please review my policies for more information. These are heavier than most items and they require special packaging; shipping will be higher. I do combine. Review my shipping policies for more info. Feel free to ask questions and thanks for looking.