Emerald

It is green coloured beryl having chromium and vanadium in trace amount. Hardness is '7.5-8.0' Makes impartial, youthful, gives wisdom and communication skills, makes clever, increases brain power, intelligence, concentration, reasoning, analytical, communication skill. Professional, grants fidelity, goodness and love in life, saves in fall from height. Source- Columbia, Brazil, Zambia, India. Planet - Mercury (Buddha). Sign (Rashi)- Gemini (Mithun), Virgo(Kanya). Metal- Gold,Bronze, Brass ,Copper , Silver ,Ashtadhatu.
Mantra:- Oum bum budhay namah.