Sample no. 1

Mineral

Relative %

Card number

1

Quartz SiO₂

50.4

(5 - 0490)

2

Microcline KAlSi₃O₈

22.2

(01 - 0705)

3

Albite (NaCa)(AlSiO₈)

20.6

(02 - 0739)

4

Biotite K₂(FeMgTi)(AlSiO₂₀)(OH)₄

6.8

(04 - 0144)