What is the trade term for a vibrant green tourmaline colored by traces of vanadium or chromium?

The trade term for a vibrant green tourmaline colored by traces of vanadium or chromium is known as chrome tourmaline. This designation is specifically used to highlight the rich green color that these trace elements impart to the stone.

Chrome tourmaline is highly valued in the gem market due to its vivid coloration and brilliance, qualities that are particularly striking and sought after by collectors and jewelers alike. The presence of chromium or vanadium not only intensifies the green hue but also contributes to the overall desirability and value of the stone.

In contrast, while emerald tourmaline references a specific variety of tourmaline that can be green, it does not explicitly denote the presence of chromium or vanadium, which are crucial for the vibrant coloration associated with chrome tourmaline. Green sapphire is a different species altogether and does not relate to tourmaline. Lastly, jadeite is a completely distinct gemstone and not relevant in the context of tourmaline. Thus, chrome tourmaline is the accurate term directly linked to the characteristics described in the question.