Antique authentic Ironstone Handpainted Cobalt Blue

This is a very old ironstone bowl with 9 sides(nonagon). The only makers mark is incised on the back and says "Pearl White". I believe it was probably made in England as a blank. It has gilding along the edge and inside the flow blue.

Ironstone is very collectible, first patented by C. Mason in 1830 England. It doesn't have iron in it, it contains the mineral feldsapr but is very heavy so that's authentic why it is called Ironstone. Crackle is an acceptable flaw in ironstone, unlike porcelain. I believe this piece is from the mid 1800 due to the shape of it and the fact it has no makers mark.

It is 10" in diameter so makes a great serving bowl though probably made to be a soup bowl. It has crackling throughout and some gray spats in the center. The edges inside and out are worn. It has no chips or cracks. It stands 2" tall.