Water blue, black and clear bottle

The color choices and the form remind me of the ocean (the blue and black) and the beach (white sand). The dew drop sort of form is really lovely. I see some crackle in the blue glaze, which really I think adds to the piece. Great job
Question: Was this raku or kiln fired (it reminds me a bit of raku)? What was the clay you used (the white looks like either stoneware or porcelain)?