I must admit to some worries, now that I’ve gone searching online. I see a lot of Jude Perry and Martha Perry work in block turquoise, but I do see at least one “JP” piece, a slave bracelet set, that is definitely real turquoise.
That has a pretty high shine for block turquoise. Heat a pin and touch it to one of the side stones, you will find out if it is block turquoise right away. Looks pretty good from the photos. I don’t put much faith in electo pencilled signatures and hallmarks.