Tiny Asian tea pot

by Janet P
(Florida)

This was my grand-mother's .. I have never been able to identify it or know if it has any value. It stands approx. 4 inches tall with the lid .. and the white porcelain glitters with a "rainbow' hue. On the bottom are three stamps. One is round in red lettering .. the other is rather rectangular shape in black lettering ... and the last is a red number and "appears" to be either the number 40 or 10. Does anyone know what it is?