Talc is a clay mineral composed of hydrated magnesium silicate with the  chemical formula Mg₃Si₄O₁₀ (OH)₂
Talc in powdered form, often in combination with corn starch, is widely used as baby powder.
This mineral is used as a thickening agent and lubricant, is an ingredient in ceramics, paint and roofing material,

Uses:-

Talc is used in many industries, including paper making, plastic, paint
and coatings, rubber, food, electric cable, pharmaceuticals, cosmetics,
and ceramics

Sizes : many different sizes such as follow :

• 10 micron
• 20 micron
• 35 micron
• 40 micron
• 800 mesh