Thread: joyas miniadas

The very beautiful sentence stands:

Desde hace un tiempo, la reproducción facsímil de alta calidad ha hecho llegar al público las joyas miniadas o los más exquisitos mapas de todos los tiempos

and my attempt:

For a long time, the high quality facsimile reproduction has allowed the general public to reach the painted miniature jewels or the most exquisite maps of all time.

miniature painted treasure/gem

In English you can call something a gem or a treasure to say that it is something you really like or value. For example, "Solfinker, you're a gem!" Maybe joyas refers to the maps as being really valuable, like treasure. Maybe "o" in the original sentence means "es decir".