Church Tithes: The Gemstones Edition is a utility mod designed for the game Foundation, which introduces a realistic tithe system that generates income based on the village's population and the employment of priests. This mod requires at least one village priest to be employed and offers a structured income system that scales with the size of the village. Smaller villages earn 7 gold coins weekly, medium villages earn 15, and larger villages can earn up to 30 gold coins weekly. Additionally, players can expect special income bonuses during key religious holidays, such as Easter and Christmas, which can significantly boost earnings depending on the village size.

The mod is integrated into the game's Miscellaneous budget category, allowing for easy tracking of income. Players can also customize the earning rates by modifying the script if desired. Future plans for the mod include visual notifications for income events and potentially adding happiness as a factor in the tithe collection system. This mod not only enhances gameplay but also pairs well with other mods, such as More Efficient Priests.