Fused Quartz Glass Lumps
High-purity fused quartz glass in irregular lump form, created by fusing silica at high temperatures into a massive, unworked state. Falls under HTS 7001.00.20.00 per Chapter 70 note including fused quartz as 'glass in the mass, other', ideal for remelting in optics production.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If contaminated or mixed with production scrap
Any waste or scrap character shifts it to cullet subheading regardless of quartz purity.
If drawn or cut into unwrought rods or tubes
Post-melting drawing processes move it from mass to cast/rolled glass in heading 7003.
If Doped fused silica may be seen as prepared chemical product, not pure glass.
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Import Tips & Compliance
• Include lab analysis proving silica content >99% to confirm fused quartz status under Chapter 70 definitions
• Avoid packaging that suggests worked glass; ship in bulk to prevent reclassification as articles
Related Products under HTS 7001.00.20.00
Soda-Lime Glass Mass Billets
Unworked soda-lime glass in the form of solid billets or lumps, produced by melting raw materials and cooling into massive shapes without further processing. Classified under HTS 7001.00.20.00 as 'glass in the mass, other' since it is unworked glass not drawn, blown, or otherwise formed into specific shapes.
Optical Flint Glass Masses
Dense flint glass in large, unworked masses with high refractive index, melted for precision optics. Classified in HTS 7001.00.20.00 as other glass in the mass, prior to any shaping or polishing.
Float Glass Melt Masses
Molten-cooled masses of float glass composition for sheet production, in unworked lump form. Under HTS 7001.00.20.00 as other glass in the mass before floating or rolling.
Colored Soda Glass Masses
Soda glass in mass with integrated colorants like cobalt for blue tint, unworked. Classified HTS 7001.00.20.00 as other glass in the mass, color from melt not surface.
High-Silica Glass Billets
Glass billets with >60% SiO2 for thermal applications, in unworked mass form. HTS 7001.00.20.00 for other glass in the mass, akin to glass wool base but solid.
Architectural Glass Melt Lumps
Lumps of melt from architectural flat glass production, unworked for remelt. HTS 7001.00.20.00 as glass in the mass, other, pre-sheet forming.