The paper discusses the interpretation of anisotropy of magnetic susceptibility (AMS) in rocks, emphasizing the role of rock magnetic effects in influencing the relationship between structural and magnetic axes. It highlights that unusual magnetic fabrics, such as inverse or intermediate, can arise due to the presence of specific magnetic minerals like single-domain magnetite or paramagnetic minerals. When multiple minerals contribute to magnetic susceptibility, interpreting AMS becomes complex, as the contribution of each mineral can vary. The paper reviews the general assumptions used in AMS interpretation, including the idea that the AMS ellipsoid is coaxial with the petrofabric, and that the shape of the ellipsoid is directly related to rock fabric. However, these assumptions are not always valid, and rock magnetic evidence is needed to assess their validity. The paper also discusses the mineralogical origin of inverse magnetic fabrics, such as those caused by carbonates, tourmaline, and biotite, and how their susceptibility can be identified through high-field and low-temperature measurements. It also addresses the problem of intermediate magnetic fabrics, which can occur when the principal axes of AMS are not aligned with the petrofabric. The paper concludes that rock magnetic techniques are essential for accurately interpreting AMS data and that the presence of multiple minerals can complicate the interpretation of AMS. The paper also discusses the symmetry of magnetic fabric versus mineralogy, noting that the shape of the AMS ellipsoid can be influenced by the mineralogical composition of the rock. Overall, the paper emphasizes the importance of rock magnetic evidence in interpreting AMS data and the need for additional techniques to accurately assess the geological significance of AMS.The paper discusses the interpretation of anisotropy of magnetic susceptibility (AMS) in rocks, emphasizing the role of rock magnetic effects in influencing the relationship between structural and magnetic axes. It highlights that unusual magnetic fabrics, such as inverse or intermediate, can arise due to the presence of specific magnetic minerals like single-domain magnetite or paramagnetic minerals. When multiple minerals contribute to magnetic susceptibility, interpreting AMS becomes complex, as the contribution of each mineral can vary. The paper reviews the general assumptions used in AMS interpretation, including the idea that the AMS ellipsoid is coaxial with the petrofabric, and that the shape of the ellipsoid is directly related to rock fabric. However, these assumptions are not always valid, and rock magnetic evidence is needed to assess their validity. The paper also discusses the mineralogical origin of inverse magnetic fabrics, such as those caused by carbonates, tourmaline, and biotite, and how their susceptibility can be identified through high-field and low-temperature measurements. It also addresses the problem of intermediate magnetic fabrics, which can occur when the principal axes of AMS are not aligned with the petrofabric. The paper concludes that rock magnetic techniques are essential for accurately interpreting AMS data and that the presence of multiple minerals can complicate the interpretation of AMS. The paper also discusses the symmetry of magnetic fabric versus mineralogy, noting that the shape of the AMS ellipsoid can be influenced by the mineralogical composition of the rock. Overall, the paper emphasizes the importance of rock magnetic evidence in interpreting AMS data and the need for additional techniques to accurately assess the geological significance of AMS.