Imperial Glass Co. UV Reactive Yellow "Little Jewel" Diamond Block Sawtooth Bowl

This is a nice yellow medium flared bowl in the Diamond Block or Little Jewel pattern. It has a sawtooth edge and footed bottom. It was made by the Imperial Glass Co. from 1927 to the 1930s. It measures 6 1/4" across the top and 2" deep. It does glow under 365nm UV light, so I'm thinking there may be some manganese in it? There is some wear such as scratches from daily use. I did find two additional scratches that look like cracks (they aren't) but are manufacturer flaws. Plz see photos and zoom in if needed. Photos are a part of the description.

Imperial made Little Jewel, originally called Diamond Block, line 330, from the late 1920s to early 1930s. It's a very pretty pattern. Little Jewel is an accessory pattern, not dinnerware, although many pieces look great on a table setting. Decorative piece only.