Before the advent of sophisticated analytical techniques red spinel often passed as this gemstone

Below you can find the Before the advent of sophisticated analytical techniques red spinel often passed as this gemstone Jeopardy Words Answer. The answer to Before the advent of sophisticated analytical techniques red spinel often passed as this gemstone has 4 letters. This clue belongs to the Gems & jewelry category and is part of Jeopardy Word Level 213. If you scroll near the bottom you will find other clues and answers part of level 213