Classic TV - Tales of Tomorrow - "The Crystal Egg" (1951)

A crystal egg reveals live tableaux of the planet Mars. A 19th Century scientist is obsessed with investigating the crystal, but the antique shop owner who came across the seemingly worthless glass hopes to sell it ASAP to a tall, insistent stranger, for whom no price is too dear. The delay while the scientist experiments on the egg makes the buyer even more desperate
https://www.imdb.com/title/tt0717056/plotsummary?ref_=tt_ov_pl

This video is in the Public Domain.