https://jet.com/product/detail/b4a6746e871d4e3b8b2307769b27abb1?jcmp=pla:ggl:gen_home_garden_a1:decor_window_treatments_a1_other:na:PLA_348543900_24223385700_pla-172942566780:na:na:na:2&code=PLA15&gclid=CjwKEAiA8dDEBRDf19yI97eO0UsSJAAY_yCSDBXJqoPBES9vmdJJqJlOMKqpu6IJRFZnyBRb5aCJaBoCocvw_wcB

Above is an 11 X 14 for $125. !!

Your pics are of the back of the panel !! It does appear to be Tiffany style but many have reproduced Tiffany patterns !! Tiffany pieces are usually signed in the lower rt corner !!
Can you take pics of the front and include the lower rt corner ??