How to clean and care for black onyx ring

From ancient times, Roman soldiers wore the black stones with heroes engraved on them, believing they were as brave as the images on the black onyx. When it comes to cleaning and caring for black onyx ring, you should avoid using any cleaning agents on the ring, even a mild soap, because they may accumulate in the porous stone and discolor it over time.
Cleaning
Set your ring in a bowl of warm mild soapy water for 1 to 2 hours. This allows dirt or grime to loosen from the ring. Then prepare a damp cotton cloth to wipe the black onyx ring carefully. You can make the cotton cloth wet and wring it out so that it's moist, not wet. Then use a clean, dry cotton cloth to dry the black onyx ring. If there are metal settings or elements in the ring, you can polish them with a jewelry polishing cloth, taking care not to polish the black onyx portions of the ring.
Caring
Wear your black onyx ring with care to avoid denting or scratching the surface. Black onyx ring can easily be damaged because black onyx stone just ranks 6.5 on the Mohs mineral hardness scale
Keep your black onyx ring in a velvet pouch or in a soft padded ring case. Do not place the black onyx ring into the jewelry boxes with other jewelry items, that situation will make the ring be scratched.
Put on last and take off first. Take your black onyx ring off when cleaning or handling harsh chemicals. Harsh chemicals damage the black onyx stone.