Gems

Gems can be found in all game modes. Each game style has its own gem:

Gem	Location	Game style	Probability
Topaz	Standard mode, standard difficulty	Efficiency	CEff
Ruby		Speed, FL	CS = 0.0015 x 3BV/s x Difficulty
Sapphire		Speed, NF	CS = 0.002 x 3BV/s x Difficulty
Amethyst		Win streak	CWS
Onyx	Standard mode, high difficulty	High difficulty	CHD = 0.003 x Difficulty
Aquamarine	No guessing mode		CNG = 0.004 x Difficulty
Emerald	All modes	Wins	CW = 0.005
Garnet	Quests
Jade	Arena		CEff + CS
Diamond	Season rewards