Depending on the stallion, horse semen is one of the most expensive liquids on the planet. A gallon of gold-medal-winning Big Star’s semen is worth $4.7 million. Once it’s collected, horse semen is sold in small tubes called straws which can sell for thousands of dollars each. Posted on November 30, 2022 Press unmute to listen email facebook linkedin twitter reddit google+ pocket Buttons by RRSSB