Find HS Code and trade information for slate

Slate

Slate is a fine-grained, foliated metamorphic rock derived from shale or mudstone. It is characterized by its ability to split into thin, flat sheets, making it a valuable material for a variety of applications.

Material Composition

The primary mineral constituent of slate is clay minerals, predominantly illite, but also including kaolinite and muscovite. Quartz and feldspar are also commonly present. The presence of iron oxides imparts a grey color to most slates, though variations can occur. Chlorite, hematite, and pyrite can also be found in smaller quantities.

Formation

Slate forms through the low-grade metamorphic alteration of shale or mudstone under relatively low temperature and pressure conditions. The pressure causes the platy clay minerals to align perpendicular to the stress, resulting in the characteristic foliation known as slaty cleavage. This cleavage allows the rock to split easily along these planes.

Purpose & Function

Historically and presently, slate is valued for its durability, impermeability, and aesthetic qualities. Its primary functions revolve around providing a protective and decorative barrier.

• Roofing: The most common application. Slate tiles are exceptionally long-lasting and weather-resistant.
• Flooring: Slate’s hardness and resistance to water make it suitable for interior and exterior flooring.
• Wall Cladding: Used as a decorative and protective covering for exterior and interior walls.
• Blackboards: Historically, slate was the primary material for school blackboards due to its ease of writing and erasing.
• Pool Tables: High-quality slate is used for pool table beds due to its flatness and stability.
• Landscaping: Slate chips and slabs are used in garden paths, patios, and other landscaping features.
• Art & Sculpture: Slate can be carved into various forms for artistic purposes.

Usage Scenarios

• Residential Construction: Roofing, flooring, and decorative elements in homes.
• Commercial Buildings: Roofing, cladding, and flooring in offices, schools, and public structures.
• Historical Preservation: Replacement of original slate roofing on historic buildings.
• Interior Design: Use in fireplaces, countertops, and accent walls.
• Outdoor Spaces: Patios, walkways, and garden features.

Common Types

Slate is often categorized by its color, geological origin, and specific mineral composition.

• Grey Slate: The most common type, typically from grey shale.
• Black Slate: Often richer in organic matter and iron content.
• Green Slate: Contains chlorite, imparting a greenish hue.
• Red Slate: Contains hematite, resulting in a reddish color.
• Purple/Violet Slate: Contains certain iron compounds.
• Buff Slate: Contains iron oxides and other minerals, resulting in a yellowish or brownish color.
• Vermont Slate: Highly regarded for its quality and durability, often grey or black.
• Spanish Slate: Known for its distinctive color variations and quality.
• Welsh Slate: A historically significant source of high-quality slate, typically grey or blue-grey.

Slate Commodity Classification and Tariff Information

The following HS codes are relevant to the declared goods "slate", based on the provided information:

• 6803001000: Worked slate and articles of slate or of agglomerated slate: Roofing slate. This HS code specifically covers slate that has been worked (processed or shaped) and is intended for use as roofing material. The tax rate details are: a basic tariff of 3.3%, an additional tariff of 25.0%, and an additional tariff of 30% after April 2, 2025, resulting in a total tariff of 58.3%.

• 6803005000: Worked slate and articles of slate or of agglomerated slate: Other. This HS code covers worked slate and articles of slate or agglomerated slate not specifically classified as roofing slate. The tax rate details are: a basic tariff of 0.0%, an additional tariff of 25.0%, and an additional tariff of 30% after April 2, 2025, resulting in a total tariff of 55.0%.

• 6801000000: Setts, curbstones and flagstones, of natural stone (except slate). This HS code covers setts, curbstones, and flagstones made of natural stone, excluding slate. The tax rate details are: a basic tariff of 2.8%, an additional tariff of 25.0%, and an additional tariff of 30% after April 2, 2025, resulting in a total tariff of 57.8%.