瑠璃も玻璃も照らせば分かる（るりもはりもてらせばわかる）

Japanese vocabulary

Meaning: cream rises to the top; great talent will stand out anywhere; you realize what things are lapis lazuli and crystal when they are lit up

See it used in real works

• Example sentences from Japanese novels & web fiction (Massif)
• Hear “瑠璃も玻璃も照らせば分かる” pronounced in real videos (YouGlish)