Onyx
Translucent, dramatic, demands a careful home.
Onyx is a banded calcite stone, often translucent enough to backlight. It is soft, brittle, and reactive — best treated as a feature material, not a workhorse.
Telltale traits
- translucent banding
- dramatic veining
- high gloss
Best for
- • Backlit walls
- • Bar fronts
- • Powder room vanities
- • Fireplace surrounds
Avoid for
- • Kitchens
- • High-traffic floors
Cleaning routine
Daily
Soft cloth with water only.
Weekly
Stone-safe pH-neutral cleaner; dry immediately.
Deep clean
Professional polishing recommended.
Sealing
Yes — Every 6–12 months
High-quality penetrating sealer is essential.
What to avoid
Any acidic cleanerAbrasivesHeavy impacts
When to call a pro
Almost all onyx repairs should be done by a stone restoration pro.
Frequently asked questions
Can onyx be backlit?
Yes — many slabs are translucent and stunning when lit from behind with even LED panels.
Does onyx scratch?
Easily. Treat it like a soft marble and protect from impacts.