Memory.com™ is an online application and educational tool designed for studying, learning and revision. Memory is not a game and is not available offline or associated with any other company.
Memory is originally based on the Supermemo SM-2 spaced repetition Algorithm.
Read more about our online study algorithms

App Version: 4.37.48

Problems?
Page frozen or something won't load?
Try hard refreshing below:

(*You will have to login again)

Gemmology

The removal of light energy by selective absorption in gem materials happens at specific __________ ___________ in different stones

Energy levels

Author

The removal of light energy by selective absorption in gem materials happens at specific _ in different stones