FLINT PEBBLES Technical Data Sheet ￼Flint pebbles has perfect performance of high silica and good hardness
To grind ceramic raw materials as a grinding medium
TYPICAL CHEMICAL ANALYSIS TYPICAL PHYSICAL ANALYSIS
Fe2O3:0.018% CaO: 0.09% MgO: 0.04%
Specific weight g/cm3 ≥
Porosity % ≤
Actual abrasion rate % ≤
Appearance of pebble
Color after burning
Flint is a hard, sedimentary cryptocrystalline form of the mineral quartz, categorized as a variety of chert. It occurs chiefly as nodules and masses in sedimentary rocks, such as chalks and limestones. Inside the nodule, flint is usually dark grey, black, green, white or brown in colour, and often has a glassy or waxy appearance. A thin layer on the outside of the nodules is usually different in colour, typically white and rough in texture. From a petrological point of view, “flint” refers specifically to the form of chert which occurs in chalk or marly limestone. Similarly, “common chert” (sometimes referred to simply as “chert”) occurs in limestone.
The exact mode of formation of flint is not yet clear but it is thought that it occurs as a result of chemical changes in compressed sedimentary rock formations, during the process of diagenesis. One hypothesis is that a gelatinous material fills cavities in the sediment, such as holes bored by crustaceans or molluscs and that this becomes silicified. This hypothesis certainly explains the complex shapes of flint nodules that are found. The source of dissolved silica in the porous media could be the spicules of silicious sponges. Certain types of flint, such as that from the south coast of England, contain trapped fossilised marine flora. Pieces of coral and vegetation have been found preserved like amber inside the flint. Thin slices of the stone often reveal this effect.
BariteWorld Flint white pebbles
If you are unable to locate a Chemical or Mineral you need, our sales department can custom source any needed materials for you directly