About Onyxium

Onyxium is an independent guide to natural stone, written for homeowners, designers and anyone about to live with a slab for the next thirty years.

We don't sell stone and we aren't tied to a quarry or a fabricator. That independence is the whole point: most of the information available to a buyer comes from someone with a slab to move, and it shows.

What we cover

How each stone forms and why that determines its behaviour, how to seal and clean without ruining a surface, and how to use a bold material without the room turning into a showroom. Where we have an opinion we say so plainly, and where the honest answer is "it depends on your slab", we say that too.

Contact

Questions and corrections: [email protected]. Corrections from fabricators and masons are especially welcome.