Fabric/ Material tuition and fabric file advice

We were given a tutorial on the best way to assemble our fabric file and how to identify different fabrics. We learnt about the different categories of fabric ranging from natural fibres which are sourced from cellulose or protein sources, aka cotton and linen being plant based and silk and animal skins being sourced from animals/ silk worm. As well as synthetic and man made fibres. I was advised to separate my fabric file into categories based on fibre content that would consequently help me identify fabrics as well as be easy for me to locate fabric types in my file for inspiration for my garments.
I decided on a simple format of categorising my fabric samples being

• Natural (Cellulose/ Protein)

• Synathetic (Man made) 

• Mixed (Fibre content having both natural and synathetic fibres)