For Mr./Ms. p*1: Obsidian Water Basin - For Bonsai, Ikebana, and More

This is an obsidian water basin. It weighs 4.8kg. My father, a bonsai artist, used it, but he has retired from bonsai, so I have decided to sell it.

You can use it to display plants in their pots, fill it with water to float items, or for ikebana (flower arranging). It was mainly used outdoors with bonsai, so although it has been washed, there are some stains that will not come off, and there are scratches on the bottom. I have cleaned it as much as possible, but it is in the condition shown in the photos. However, it is solid overall, has a good weight, and the exterior has a glossy finish, giving it a substantial feel. Please refer to the photos for the size.
It is said to be obsidian, but there is no proof, and the origin is unknown. I would like to pass it on to someone who can use it.