How to create Recycled granulate plastic Material in Keyshot?

Dear all,

For my graduation project I designed a little chair for in office and retail environments that will be made from recycled plastic. To enhance the environmental consciousness of the user I decided to give the plastic module inside the frame a 'recycled appearance'. The plastic granulates from which the module is made are therefore still visible in the final product. I have attached an example product from Ecopixel.

I have three different colour mixes of the material the product will be made of; (See pixtures)

Is there anyone who can help me with getting this effect? I have tried to put a picture of the material as a label on the product, but it does not look like I hoped it would...

Thanks!