ERSC 223 questions and answers already solved 2025

ERSC 223- Final Exam Minerals
Question and answers rated A+
(Mg,Fe)2SiO4 - correct answer ✔Olivine (Forsterite-Mg, Fayalite-Fe)
(nesosilicate)


X3Y2SiO4 - correct answer ✔Garnet (nesosilicate)


ZrSiO4 - correct answer ✔Zircon (nesosilicate)


Al2SiO5 - correct answer ✔Kyanite/Silliminite (nesosilicate)


Ca2(Al,Fe)Al2O(Si2O7)OH - correct answer ✔Epidote (sorosilicate)


Na(Mg,Fe)3Al6(BO3)3(Si6O18)(OH)4 - correct answer ✔Tourmaline
(cyclosilicate)


Be3Al2Si16O18 - correct answer ✔Beryl (cyclosilicate)


Mg2Si2O6 - correct answer ✔Enstatite (inosilicate->pyroxenes->ortho)


(Mg,Fe)2Si2O6 - correct answer ✔Hypersthene (inosilicate->pyroxenes-
>ortho)


Ca(Mg,Fe,Al)(Al,Si)2O6 - correct answer ✔Augite (inosilicate->pyroxenes-
>clino)

, CaMgSi2O6 - correct answer ✔Diopside (inosilicate->pyroxenes->clino)


NaAlSi2O6 - correct answer ✔Jadesite (inosilicate->pyroxenes->clino)


LiAlSi3O6 - correct answer ✔Spodumene (inosilicate->pyroxenes->clino)


NaCa2(Mg,Fe,Al)5(Al,Si)8O22(OH)2 - correct answer ✔Hornblende
(inosilicate->pyroxenes->amphiboles)


Ca2Mg5Si8O22(OH)2 - correct answer ✔Tremolite, Actinolite (inosilicate-
>pyroxenes->amphiboles)


Na2Mg3Al2Si8O22(OH)2 - correct answer ✔Glaucophane (inosilicate-
>pyroxenes->amphiboles) (blueschist)


CaSiO3 - correct answer ✔Wollastonite (inosilicate->pyroxeniods)


SiO2 - correct answer ✔Quartz, Tridymite (L pressure) , Crystobalite,
Coesite, Stishovite (H pressure) (tectosilicate)


SiO2*n(H2O) - correct answer ✔Opal (tectosilicate)


KAlSi3O8 - correct answer ✔Sanidine, Orthoclase, Microcline, Anorthoclase
(if Na Sub) (tectosilicates: K feldspar)


CaAl2SiO8 - correct answer ✔Anorthite (tectosilicates: Plagioclase)


NaAlSi3O8 - correct answer ✔Albite (tectosilicates: Plagioclase)