Ankylosaurus is commonly recommended for efficient crystal harvesting, especially when its melee damage is improved, while Magmasaurs may outperform it in some settings. A metal pick, Mantis equipped with a pick, or mining drill can work well early on or when a creature is unavailable, but their effectiveness varies by equipment and platform. Look for crystal on volcanoes, mountains, high cliffs, and certain caves, and use a weight-capable flyer or transport mount to haul the heavy harvest safely.