| Granite | Igneous | Quartz, feldspar, mica, and other minerals | Approximately 6–7 | Usually low, about 0.1%–1.0% | - Highly resistant to scratching and abrasion
- Good resistance to heat and everyday wear
- Available in many granular colors and patterns
| Kitchen countertops, flooring, stairs, exterior cladding, monuments, and heavily used commercial surfaces | Sealing may be recommended because absorption varies by stone. Check the slab for fissures, resin repairs, and consistent thickness before installation. |
| Marble | Metamorphic | Primarily calcite or dolomite | Approximately 3–5 | Commonly about 0.2%–2.0%, depending on type and finish | - Distinctive veining and a wide color range
- Can be honed or polished to a smooth finish
- More susceptible to scratching and acid etching than granite
| Bathroom vanities, wall panels, fireplace surrounds, flooring, furniture, and decorative features | Use pH-neutral cleaners. Avoid lemon juice, vinegar, and other acidic substances. Expect possible patina and etching in high-use areas. |
| Quartzite | Metamorphic | Very high quartz content, with minor accessory minerals | Approximately 7 or higher | Generally low, often about 0.1%–1.0% | - Very hard and resistant to abrasion
- Natural colors and veining can resemble marble
- Usually performs well in demanding interior applications
| Kitchen countertops, islands, flooring, wall cladding, backsplashes, and commercial interiors | Confirm that the material is true quartzite rather than a softer quartz-rich stone. Sealing requirements depend on porosity and the selected finish. |
| Limestone | Sedimentary | Primarily calcite, sometimes with dolomite, fossils, or clay minerals | Approximately 3–4 | Often about 0.5%–5.0% or higher | - Soft, understated appearance with natural fossil variation
- Easy to cut and shape compared with harder stones
- Sensitive to acids and can absorb spills if unsealed
| Wall cladding, interior flooring, fireplaces, bathroom walls, paving, and architectural details | Best suited to areas where a naturally aged appearance is acceptable. Use suitable sealers and avoid acidic cleaning products. |
| Travertine | Calcareous sedimentary stone | Calcite formed from mineral-rich groundwater, with natural voids | Approximately 3–4 | Often about 0.5%–3.0%, depending on filling and finish | - Recognizable pores, pits, and layered movement
- Warm, earthy colors and a naturally textured appearance
- Can be filled, honed, polished, or brushed
| Bathrooms, shower walls, flooring, patios, pool surrounds, backsplashes, and feature walls | Unfilled surfaces require more frequent cleaning and care. Acid-sensitive; use a penetrating sealer where appropriate and maintain grout joints carefully. |
| Slate | Metamorphic | Fine-grained clay minerals, mica, quartz, and other minerals | Approximately 3–5 | Commonly about 0.2%–2.0%, but varies considerably | - Natural cleavage creates layered, textured surfaces
- Good slip resistance when appropriately finished
- Color may range from gray and black to green, purple, or rust tones
| Roofing, flooring, fireplaces, wall cladding, patios, walkways, and shower areas | Choose a stable, dimensionally sound grade for flooring. Cleaved surfaces may require more effort to clean, and some slates can show minor flaking. |
| Sandstone | Sedimentary | Quartz and feldspar grains bonded by silica, calcite, or other cement | Approximately 5–7 | Often about 1%–10% or higher | - Visible grain structure and a naturally warm appearance
- Performance varies significantly with density and cement type
- Some varieties are vulnerable to moisture, salt, and freeze–thaw damage
| Exterior paving, facades, garden walls, steps, fireplaces, and interior feature surfaces | For outdoor use, select a low-absorption stone rated for the local climate. Proper drainage, installation, and sealing are important in freeze–thaw regions. |
| Soapstone | Metamorphic | Primarily talc, with varying amounts of chlorite, magnesite, and other minerals | Approximately 1–2 | Very low; commonly below 0.5% | - Soft, dense, and naturally non-porous
- Resistant to heat and many household chemicals
- Can develop a darker, aged appearance with use or oiling
| Kitchen countertops, sinks, laboratory surfaces, fireplace surrounds, and heat-resistant architectural details | Its softness means it can scratch or dent more easily than granite. Minor marks can often be sanded, and mineral oil may be used to even out color if desired. |