Calcite (CaCO₃) is not magnetic in its pure form because it is primarily composed of calcium, carbon, and oxygen, none of which are ferromagnetic (strongly attracted to magnets).
However, there are a few exceptions where calcite might appear weakly magnetic:
1. Impurities – If calcite contains trace amounts of iron-bearing minerals (like magnetite or hematite), it may show slight magnetic attraction.
2. Ferromagnetic Inclusions – Small particles of magnetic minerals trapped within calcite crystals could make the sample respond to a strong magnet.
How to Test:
– Use a strong neodymium magnet—if there’s no attraction, the calcite is non-magnetic.
– If there’s weak attraction, impurities or inclusions are likely present.
For most practical purposes, though, pure calcite is considered non-magnetic. Let me know if you’d like details on related minerals!