Loquat (Eriobotrya japonica)?

I would greatly appreciate it is someone could confirm if the seeds in the attached JPEGs belong to the Japanese plum Loquat (Eriobotrya japonica). Thank you.

 

They appear to be too big and of the wrong shape to be loquat seed. Compare with photos in the following documents:

• https://www.inaturalist.org/guide_taxa/734372
• https://www.livinginwellbeing.org/nutrition-facts-health-benefits-of-loquat-fruits/

 

All these seeds show just the shiny top.
Bottoms are also important.
The base also might help with an id...it might help to eliminate wrong names.

eg pic of a horse chestnut conker.
https://www.alamy.com/stock-image-s...pocastanum-on-white-background-164998997.html

eg..
https://www.flickr.com/photos/reulim/49745886347/in/album-72157709043122061

 

Agree not Loquat seeds - they look like giant-size Apple pips in shape (not too surprising, as they're related).

 

Thank you everyone, much appreciated. I think that it is probably horse chestnut conker.

 

I just added that link to show an example of the bottom of the seed.
Horse chestnut seeds ..conkers are not mottled.
They are super shiny.
I do not believe it is a conker.
My pics of a conker below.



Please add clear pics of the bottom of your seeds.