The Harmonized System Nomenclature (HSN) code for calcite powder is: 283650
This code is used to classify calcite powder under the Goods and Services Tax (GST) regime in India. Calcite powder falls under the category of "carbonates; peroxo carbonates (percarbonates)" within the Chemical Industry Classification.
Make sure to use this HSN code correctly when filing GST returns to maintain proper tax compliance.