Usually they are metal oxides that is compounds of metallic elements and oxygen but many ceramics.
Difference between metals and ceramic crystals.
The key difference between minerals and crystals is that minerals are naturally occurring substances whereas crystals can be natural or synthetic.
Ceramic crystal structures broader range of chemical composition than metals with more complicated structures usually compounds between metallic ions e g.
The crystals in the solidified metal are called grains and the surfaces between them are named grain boundaries.
Mineralogy is the study of minerals.
Differences between pure and soft metals and ceramics are very large but metalic materials and steel used for industrial machine and equipments hardened to give designed strength.
Fe ni al called cations and non metallic ions e g.
Industrial ceramics are commonly understood to be all industrially used materials that are inorganic nonmetallic solids.
As nouns the difference between polymer and ceramic is that polymer is organic chemistry a long or larger molecule consisting of a chain or network of many repeating units formed by chemically bonding together many identical or similar small molecules called monomers a polymer is formed by polymerization the joining of many monomer molecules while ceramic is.
I hope this answers your question.
We have discovered more than 4000 minerals and they have a crystalline structure inside the earth due to heat and various other reactions minerals and rocks melt together.