Sphalerite ((Zn, Fe)S) is a mineral that is the chief ore of zinc: the colors spectrum of its gems is awesome https://t.co/Tg9S5XckIa pic.twitter.com/0AfyIE2CNH
— Massimo (@Rainmaker1973) June 8, 2018
from Twitter https://twitter.com/Rainmaker1973
June 08, 2018 at 02:16PM
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