Onyxium is a reader's guide to natural stone — onyx, marble, travertine and the rest — covering how each one forms, where it belongs and how to keep it looking right for decades.
Onyx, marble, quartzite — what each is and where it comes from.
Sealing, cleaning and the mistakes that etch a surface.
Using stone so it reads as calm, not busy.
Reading a slab before it becomes a countertop.