What kind of pipe does Gandalf smoke?

Those pipes are charming; but I’m going to divert the question for a moment, because
I have a soapbox item for you.
My darling husband smoked many different kinds of substances in many different
kinds of formats for 60 years. Then he died.
I will always love him utterly; and I love you too, whoever you are, and I want you to
back off on smoke. I know it’s the hardest thing in the world to do. Do it for us; do it
for you.

It’s called a churchwarden

“Finest weed in the south.”

Was it a briar or clay churchwarden?

Can’t tell. Clay pipes are light colored, generally, and Gandalf’s is black, so I don’t think clay. (Frankly it’s probably some polymer from the props shop)