Looks like stained glass with hand crafted designs
From my mother
This is antique American Carnival Glass from the early 20th century. The molded mark on the underside of the letter N in a circle is for the maker, Northwood of Ohio originally then Pennsylvania. The bowl has a molded basket weave pattern on the outer side and bas-relief molded fruits on the inside with ruffled rim and pie crust edge; the glass itself is iridescent blue or purple (if you hold this up to a light, you can see the 'true' glass color). The pattern is called "Three Fruits" and was introduced in 1910. This pattern is extremely desirable and valuable in their opal color; your dark iridescent color is sought after as well though does not garner as high as the opal color. The estimate, in USD, is based on actual recent past recorded auction sales of comparables.