One of my grandsons is interested in a career in gemology. He has done some research and thinks he has found a good school. It's called the GIA (Gemology Institute of America.) The school is headquartered in California with 12 branches around the world.
Hands-on learning with experts, gives experience working with actual gems in jewelry design, repair, gem identification, and other related areas.
My grandson likes the small classes and individual instruction that's offered at this school. You also have the choice of taking the classes online and they will loan you stones for the hands-on part of the classes.