So what is the type of clay you have suitable for or what can you use the clay you have for?
Quite often the information is on the bag the clay was packed in.
On the example on the right the box ticked is for RGH which has the information on:
The fired colour - Red Iron Stoneware
The fineness of the clay indicated by the mesh number #60 - medium texture.
The bisque temperature - Cone 06 ~1000°C
And glaze temperature - Cone 8 to 10
~ 1270 to 1300°C