Tortoise or Turtle?

Last year, out of the blue, a lady contacted me asking if I could make her a tortoise brooch. She was a true tortoise fancier, you know those collectors that only collect one thing.
So now her lino tortoise has outings on her coat lapel.After looking at a few tortoise pouffe stuffies lately, I decided to make another, definitely a tortoise, not a turtle.
I think I'll call him Torbert!