ML042 Tourmaline
名稱 紅電器石Name Red Tourmaline化學公式 (Na,K,Ca)(Mg,Fe,Mn,Li,Al)3(Al,Fe,Cr,V)6Si6O18(BO3)3(O,OH,F)4Chemical Formula (Na,K,Ca)(Mg,Fe,Mn,Li,Al)3(Al,Fe,Cr,V)6Si6O18(BO3)3(O,OH,F)4莫氏硬度 7-7.5Mohs scale of Hardness 7-7.5描述 一種含硼的環狀硼矽酸鹽礦物,具有壓電效應 其他種類的電氣石:鐵電氣石,鎂電氣石,鋰電氣石. Description A red crystalline boron silicate mineral that have Piezoelectricity property. Other type of tourmaline:schorl(consist of Iron and Sodium),dravite(consist of magnesium and Sodium),elbaite(consist of lead)小挑戰 鋰電氣石(elbaite)源於哪裏? (義大利厄爾巴島)Challenge Where do elbaite originated from? (Island of Elba,Italy) Reference 1.https://en.wikipedia.org/wiki/Tourmaline 2. https://www.gemsociety.org/article/tourmaline-jewelry-and-gemstone-information/ By 4B Ko Ka Chun (9) on 16/4