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.