Stone Education Guide · Elite Tile & Stone

Onyx
Natural Stone

Among the most stunning and most delicate natural stones — onyx demands expert care.

At a Glance

Onyx Properties

Classification

Calcium-based Sedimentary Rock

Hardness

Mohs 3–3.5 — Very Soft

Acid Sensitivity

Very High — extremely reactive to acids

Color Range

White, honey, green, black, rust — with dramatic translucent banding

Primary Origins

Iran, Mexico, Pakistan, Turkey, USA

Common Uses

Feature walls, Vanity tops, Bar surfaces, Decorative applications, Shower surrounds

How It Forms

What Is
Onyx?

Onyx is formed by the slow deposition of calcium carbonate in caves and springs — the same general process as travertine, but with conditions that produce a much more dense, translucent material with distinct banding. The characteristic bands of color in onyx reflect the changing mineral content of the water during deposition. True onyx is relatively rare and is considered a premium luxury stone.

How It Looks

Onyx is defined by its translucency and its dramatic banded color patterns. When backlit, onyx glows — making it a popular choice for feature walls, bar surfaces, and decorative applications where the effect can be showcased. Colors range from white and honey to deep green, black, and rust. Each slab is genuinely unique — the banding patterns do not repeat.

In Your Home

How Onyx
Performs

Onyx is one of the softest and most delicate natural stones. It scratches easily, etches readily from any acidic contact, and is more fragile than marble or limestone. It is not a practical choice for high-use surfaces like kitchen countertops — its beauty is best preserved in lower-contact applications where it can be showcased. Professional restoration of onyx requires the most controlled and careful technique of any stone we work with.

Our Restoration Approach

Onyx restoration is the most delicate work we perform. The stone's softness and fragility require highly controlled abrasive sequences and careful technique. The results — when done correctly — are extraordinary. The depth and translucency of properly restored onyx is unlike any other natural stone. We assess every onyx job carefully and are honest about what the stone can support before beginning.

How to Care for It

Onyx Maintenance Tips

Proper care extends the life of your onyx significantly and reduces the frequency of professional restoration.

Treat onyx as the most delicate stone in your home — it is
Never use any acidic product near onyx — it etches almost immediately on contact
Use only the gentlest pH-neutral cleaners specifically formulated for stone
Avoid placing heavy or sharp objects on onyx surfaces
Professional restoration when etching occurs — DIY attempts on onyx are high risk

Restoration Services

We Restore Onyx
Throughout North Idaho

If you have onyx in your home or commercial property in Coeur d'Alene, Hayden, Post Falls, or Rathdrum — we can assess and restore it.

Countertop Restoration

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Shower Restoration

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Scratch & Etch Removal

Fireplace Restoration

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Common Questions

Onyx Questions

Onyx is one of the softest and most delicate natural stones — beautiful but high-maintenance. It scratches, etches, and chips more easily than most stones, so it's best for low-use areas, accent pieces, and backlit features rather than hard-working kitchen counters.

Yes, but onyx requires the most careful technique of any stone we work with. Its softness and translucency demand a delicate hand. We restore onyx surfaces using fine progressive abrasives and specialized polishing — it's specialist work.

Onyx is naturally brittle and often has internal fissures. It's frequently reinforced with mesh backing for this reason. Chips and cracks can be repaired with color-matched fill, including translucent fills that match onyx's depth.

Treat onyx gently — stone-safe cleaners only, no acidic products, coasters and trivets always, and keep it sealed. Onyx rewards careful ownership with stunning appearance, especially when backlit.

Free Quote

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OnyxNatural Stone

Onyx Properties

What IsOnyx?

How OnyxPerforms