The magma vases have a glossy, white top and matte, cracked, white bottom. These are 2nd grade as they are glaze testers. The magma glaze should usually crackle on the bottom glaze, but it does not really do that here.
There are 2 of this type.
Size Small (height approx. 13 cm.)
The magma vases are on their way back in the range, and therefore the glaze is sometimes tested first. That way I can learn how it behaves in the burning with other vases, and optimize the glaze so that it looks the way I want.