Agate Milling Balls (2-20 mm), 100-300 pcs/bag, MBAG

Agate Milling Balls—carved and precision-polished from high-purity, naturally occurring microcrystalline silica (SiO2, predominantly chalcone/quartz bands)—represent a traditional laboratory favorite for lower-energy, high-purity sample preparation. Unlike technical ceramics synthesized from artificial chemical powders (like Alumina or Zirconia), high-grade laboratory agate is selected directly from natural mineral deposits. It is thoroughly processed to eliminate cracks, producing a highly dense, glass-smooth grinding media.

The critical advantages of agate milling balls are: (1) Zero Heavy Metal Contamination: Because agate consists purely of silicon and oxygen lattice frameworks (SiO2), it completely eliminates the introduction of structural transition metals such as Iron (Fe), Chromium (Cr), Nickel (Ni), or Cobalt (Co) into your formulation. This makes it an invaluable baseline standard for environmental soil assaying and biochemical sampling. (2) High Resistance to Acids and Solvents: Agate possesses exceptional chemical stability. It is completely inert when exposed to organic solvents (ethanol, acetone, toluene) and resists attack from strong mineral acids (like hydrochloric acid, HCl, or nitric acid, HNO3). Exception: Never expose agate to hydrofluoric acid (HF), which aggressively dissolves silica frameworks. (3) Gentle Mechanical Attrition: Because of its lower density (2.65 g/cm3), agate balls do not slam into sample matrices with the destructive kinetic force of tungsten carbide or heavy steels. Instead, it relies heavily on high-surface-area friction and gentle rolling attrition. This makes it ideal for processing fragile crystals or organic components that would structurally degrade or deform under intense thermal/impact stress.