Sedona Red Sandstone

Sedona Red Sandstone is a visually striking sedimentary rock that is characterized by its deep vermilion hues, primarily caused by hematite staining. This stone is famous for its ability to change colors throughout the day, providing a dynamic visual experience. Below is a detailed description of its properties, composition, uses, and finishes.

Physical and Mechanical Properties

• Water Absorption: ~4.0%
• Density: 141 to 145 lbs/cu ft (2258 – 2323 kg/m³)
• Flexural Strength: Not specified, but generally moderate for sandstones
• Compressive Strength: 11,000 to 15,000 psi (75.8 – 103.4 MPa)
• Hardness: Moderately hard, suitable for various construction applications
• Porosity: Moderately porous, contributing to its water absorption characteristics
• Slip Resistance: Offers moderate slip resistance, suitable for some outdoor applications

Chemical and Mineral Composition

Mineral Composition:

• Quartz: Major constituent
• Hematite: Responsible for the red coloration
• Feldspar: Minor component

Chemical Composition (% by weight):

• Silica (SiO2): Dominant content due to quartz
• Iron Oxide (Fe2O3): Provides the red hue, varies in concentration
• Other minerals contributing to minor differences in color and texture

Usage

• Construction: Widely used for building facades due to its striking appearance.
• Landscaping: Popular in landscape architecture for its vibrant color palette.
• Interior Decoration: Used for feature walls and decorative pieces.
• Paving: Can be used for walkways, although care must be taken due to its porosity.

Maintenance

• Regular cleaning with mild soap and water.
• Sealing recommended to minimize water absorption and protect against staining.
• Avoid harsh chemicals that could damage the stone.

Cutting Sizes

• Commonly cut in slabs of varying thicknesses, but standard sizes are often customized:
• Thickness: 2 cm to 5 cm
• Other dimensions based on project requirements

Available Common Surface Finish Options

• Honed Finish: Smooth, matte surface, reducing glare and highlighting natural colors.
• Polished Finish: Not typically applied due to the porosity of sandstone, but possible for specific applications to enhance color depth.
• Natural Cleft Finish: Retains natural textural properties, popular for exterior applications.
• Sandblasted Finish: Provides a rough texture, enhancing slip resistance for outdoor surfaces.

Appearance

• Color Variations: Deep orange-red base similar to rust, terracotta, or burnt sienna, with color shifts throughout the day.
• Striations: Horizontal white or cream-colored bands of pure bleached quartz provide visual contrast.
• Time of Day Variation: Glows bright crimson and fiery orange during sunrise and sunset, while appearing more muted brown or tan under harsh midday sunlight.

This sandstone, quarried in the Sedona region of Northern Verde Valley, Arizona, is both a cultural and geological treasure, offering not just structural utility but also aesthetic appeal.