Place a pizza stone in a cold oven. Preheat the oven to 425F.
Sift flour, cream of tartar, baking soda and salt together into a large mixing bowl. Add the cheddar and the sage and toss to combine.
In a large measuring cup, whisk the buttermilk, egg and butter together until incorporated.
Make a well in the centre of the flour mixture and pour the buttermilk mixture into the centre. Stir until it forms a sticky dough.
Turn the dough onto a well-floured surface. Knead the dough for 3 minutes, then form it into a boule-like shape. Using a bench scraper, cut the dough like a pizza into 8 even pieces.
Place the scones on the heated pizza stone and bake for 25 minutes or until golden brown.
Take the scones out of the oven and immediately brush with honey.
Let stand for 10 minutes before serving.