You can place materials and appearances into the same library.
On the ribbon, click Tools tab Material and Appearance panel
Material
. The Material Browser displays.
In the Material Browser toolbar, click
Create New Library.
Browse to the folder where you plan to save the new library, and specify a library name.
Click Save. In the Material Browser, lower section, the library is visible in the Library list.
Decide whether to organize your library using categories. To create a category:
Select the source library that contains content for your custom library. The contents display in a list on the right.
Drag and drop all materials and appearances from the source library into your custom library. You can drop materials on category or library nodes.
Close the Material Browser.