Ruby Mica Crude Blocks
Unprocessed ruby muscovite mica in large crude blocks, directly from mining operations. Falls under HTS 2525.10.00 as crude mica not yet rifted into sheets. Prized for its reddish hue and dielectric properties in specialty capacitors.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If gem-quality and faceted
Precious or semiprecious stones like high-grade ruby mica fall under Chapter 71.
If mixed with amber or meerschaum
Heading 2530 covers mixed mineral products like agglomerated amber with mica.
If as mica waste from block trimming
Waste generated during crude block processing is classified separately.
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Import Tips & Compliance
• Obtain color and purity certificates to justify premium valuation and avoid under-valuation disputes
• Confirm no pre-rifting to distinguish from sheets under the same heading
• Comply with CITES if sourced from regions with biodiversity concerns affecting mica mining
Related Products under HTS 2525.10.00
Crude Muscovite Mica
Natural crude muscovite mica mined directly from deposits, consisting of unprocessed sheets or blocks with irregular shapes and thicknesses. It falls under HTS 2525.10.00 as crude mica that has not been further rifted, cut, or processed into sheets or splittings. This raw form is typically used as feedstock for splitting into thinner laminae.
Phlogopite Mica Sheets
Phlogopite mica rifted into thin, flexible sheets from crude blocks, retaining natural cleavage without cutting to specific dimensions. Classified under HTS 2525.10.00 as mica rifted into sheets or splittings, suitable for further processing into electrical insulators. Its high heat resistance makes it ideal for high-temperature applications.
Mica Splittings in Book-Pack
Thin mica laminae split into book-form packs, suitable for manufacturing agglomerated mica products. This product matches HTS 2525.10.00 for crude mica rifted into sheets or splittings, as defined in statistical note (b) for mica splittings. Commonly used in composites for electronics and construction.
Biotite Mica Splittings
Biotite variety of mica rifted into loose splittings for industrial grinding. Classified in HTS 2525.10.00 per the description of crude mica and rifted splittings, prior to any powdering. Used in paints, drilling fluids, and fillers.
Lepidolite Crude Mica
Crude lepidolite mica ore containing lithium, extracted in block form without rifting. HTS 2525.10.00 covers this as crude mica, distinguished from lithium concentrates. Primarily imported for lithium extraction and ceramics.
Muscovite Mica Book-Form Splittings
High-quality muscovite mica split into book-form stacks of laminae, per statistical note (b). Under HTS 2525.10.00 as rifted splittings suitable for agglomerated mica production. Essential for high-voltage insulation manufacturing.