When I Got Engaged, We Went To A Local Gemologist ...

When I got engaged, we went to a local gemologist at his home. He took us to his living room, pulled his hand out of his pocket and held it out with several stones and said, "Pick one."

Gemologists/geologists are able to analyze and discern which gems/metals are best. That’s why Paul prays in Phil. 1:10 so we, too, can discern which is the best gem.