Mineral and organic Gemstone artwork cards

The original picture cards of several minerals are stamped with the scenery seal of the post office near the Ueno Park National Science Museum (a related location where the mineral exhibition is held). The landscape stamp pattern is Ueno Park, which is interesting. If you have high requirements for the harmony of the postmark pattern, you should consider it before purchasing. Amethyst, sapphire, ruby, and Stone are stamped near the origin of Japan.