Hi Abigail,

Thank you for contacting Mearto with your appraisal inquiry.
I refer you to these recent auction sales that were used in valuing this set:
(https://www.liveauctioneers.com/search/?keyword=american%20Brilliant%20period%20glass%20pitcher%20tumblers&page=1&pageSize=24&sort=-relevance&status=archive)
Based on the photos and information provided, and subject to examination, this is:

A vintage 9-piece American Brilliant Pattern cut glass drinks set
unattributed maker, late 19th Century
Comprising a pitcher and eight 8-oz tumblers, all with bright cut decoration and rose design
(DIMENSIONS)
CONDITION: not examined in person but appears to be in good condition
$400-600 for the set*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, and thank you again for using Mearto.