Usually - yes!
We design our lamps to come with fairly standard shades so that you can have the freedom to use the lamps with various design themes. So for any of our lamps that come with a removable shade, you can definitely swap that out for something else, if you're looking to create a specifically stylized look.
Most of our fabric lamp shades are designed to use a UNO or Euro fitting, where a loop coming from the shade slides over the socket, and then the bulb is fastened over it - as pictured below.
Some of our lamps use a harp attachment, and others (generally our non-fabric shades) use threaded shades that are screwed directly onto the socket.
If you're interested in one of our designs but have a specific shade in mind that you'd like to make sure will be compatible with your new lamp, feel free to reach out to us for information on the shade specs of your lamp and we'll be happy to help.