No. The name of the currently available green drake mount is Emerald Drake, and has been for years since it was released in like MoP, and yet green dragonflight is still green dragonflight. It only indicates that they might have forgotten there's already an 'Emerald Drake' in game.
Edit: they've used gem/mineral names for dragon elements before- Ruby and Obsidian Sanctums, Azure Drake (azure references lapis lazuli), the dragonshrines in Dragonblight, and I think they've called bronze drakes amber (in Nexus maybe? Might have called red dragons ruby there too). A drake mount buff effect being called 'emerald' just isn't noteworthy other than it just existing. Like how many synonyms are they going to use for different colors, especially since they'll have to be localized so they can't be English specific.

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there will be some nice things I hope! Everyone made fun of Mists of Pandaria, cause Kung Fu Panda. I wonder how they will call next one, reign of fire? This dragon movie was great, gonna rewatch it 




