## Common ground
Both options involve quartz-based materials, but differ in composition, processing, and end use.
## Options at a glance
**6810.99 – Agglomerated quartz slabs**
- **Defining trait:** Made by binding ground quartz with polymer resins; used for durable, non-porous surfaces like kitchen countertops.
- **Typical examples:** Countertop slabs, bathroom vanities, bar tops.
- **Best fit when:** The product is a solid, engineered slab used in interior design or construction for surfaces requiring resistance to stains and heat.
**7020.00 – Quartz glass and glass products**
- **Defining trait:** Made from fused natural quartz (silica), processed into transparent or translucent high-purity glass; used in specialized industrial or optical applications.
- **Typical examples:** Laboratory glassware, optical lenses, semiconductor industry components.
- **Best fit when:** The product is transparent, heat-resistant, and used in scientific, electronic, or high-performance technical settings.
## Key differences
| Feature | 6810.99 – Agglomerated slabs | 7020.00 – Quartz glass products |
|-----------------------|-------------------------------------|--------------------------------------|
| Material form | Engineered composite (quartz + resin) | Pure fused silica (glass) |
| Transparency | Opaque or semi-opaque | Transparent |
| Primary use | Architectural surfaces | Industrial, optical, electronic |
| Processing method | Molding and curing | Melting and shaping at high temp |
## How to choose
- Is the product opaque or colored? → 6810.99
- Is it transparent and used in labs or tech devices? → 7020.00
- Does it resemble a kitchen countertop or vanity? → 6810.99
## Overlaps & pitfalls
A product could be mistaken for both if it’s a clear, engineered quartz slab—however, true quartz glass (7020.00) is not typically used in countertops. The key distinction is **material purity and transparency**: agglomerated slabs are opaque composites; quartz glass is pure, transparent silica. If unclear, prioritize the product’s **main function**—interior surfaces vs. technical applications