Example of diamagnetic materials
Those materials which when placed in a magnetic field become weakly magnetized in a direction opposite to that of the applied field, are called as diamagnetic materials.
Example: bismuth, antimony, copper, gold, quartz, mercury, water, alcohol, air, hydrogen etc..
Reference: This article is referred from my book “electrical engineering materials” having ISBN 978-81-272-5069-0. In case of any doubt, you can put your question in the comment section.
Is any material is fully diamagnetic
yeeeee borther
The internal magnetic field of a superconductor is 0, even if a (weak) external field is applied. This means that the magnetic susceptibility of superconductors is -1 (i.e. they behave like perfect diamagnets). This field needs to be weak as, if a large field is applied, the material becomes no longer superconducting. Hope this helped!