Small Vessel Grey Clay Stamped / Signed G

Hi, any help identifying this is much appreciated.

I think stoneware but am unsure - ceramic is a grey colour. Some of the glaze is pitted and crackled.

It’s raku (a type of low fired ceramic). The closest G mark in the Marks book seems to be Georgie Gardiner but there’s no mention of her doing raku

Thanks for the info Naomi M. I have some other pottery I thought could be raku but didn't know this one was. I had a look at Georgie Gardiner's work online - very nice stuff- but didn't see anything similar to this, she may have dabbled in raku perhaps, but I guess could be another G with a similar mark.