Can ammonia be used to clean a white topaz?

Yes, ammonia can be used to clean white topaz, but it should be done with caution. A diluted solution of ammonia and water can effectively remove dirt and grime without damaging the stone. However, it's essential to avoid prolonged exposure to ammonia, as it may weaken the stone or affect any treatments it has undergone. Always rinse the stone thoroughly with water after cleaning to remove any residue.