Mineralogy 220 Lab Exam UBC | Questions and Answers | 2025 Update | 100% Correct.

Mineralogy 220 Lab Exam UBC
Chalcocite (Sulphides) - ✔️✔️Cu2S
-very heavy
-shiny dark grey streak
-Hardness 2.5-3
-dull metallic and dull gold

Hematite (Oxides and Hydroxides) - ✔️✔️Fe2O3
-opaques with metallic lustre
-streak is dark cherry red

Corundum (Oxides and Hydroxides) - ✔️✔️Al₂O₃
-very heavy
-can't streak
-dark purple colour
- dull lustre

Bauxite (Oxides and Hydroxides) - ✔️✔️Complex of aluminous hydroxides
-marbly orange color
-dull metallic

Ilmenite (Oxides and Hydroxides) - ✔️✔️FeTiO3
-slightly magnetic
-dark silver colour


Apatite (Phosphates) - ✔️✔️Ca5(PO4)3(OH,F,Cl)
-strong yellow fluorescence
-yellow/green colour
-vitreous

Copper (Native Elements) - ✔️✔️Cu
-bronze metallic
-very heavy

Sulfur (Native Elements) - ✔️✔️S
-yellow colour

Graphite (Native Elements) - ✔️✔️C
-very brittle
-greasy

, Gold (Native Elements) - ✔️✔️Au
-bright metallic lustre

Bornite (Sulphides) - ✔️✔️Cu₅FeS₄
-peacock ore
-metallic
-poor cleavage

Galena (Sulphides) - ✔️✔️PbS
-dark grey metallic
-compact granular surfaces

Sphalerite (Sulphides) - ✔️✔️ZnS
-metallic
-white, copper, dark grey
-beige streak

Cinnabar (Sulphides) - ✔️✔️HgS
-frequently brightly coloured red
- don't handle outside of bag

Molybdenite (Sulphides) - ✔️✔️MoS₂
-metallic/earthy
-Hardness 1-1.5
MAGNETIC

Covellite (Sulphides) - ✔️✔️CuS
-very soft hardness 1.5-2
-indigo blue

Chalcopyrite (Sulphides) - ✔️✔️CuFeS2
-green-black streak
-marbly metallic appearance

Fluorite (Halides) - ✔️✔️CaF2
-strong purple fluorescence
-purple and white marbly
-white streak
-twinning habits

Halite (Halides) - ✔️✔️NaCl
-Salty taste
-glassy
-colorless