Mineral

Formula

S.G.

Magnetic Properties

Hardness

Quartz

SiO₂

2.6

Diamagnetic

7

Chlorite

(Mg, Fe²⁺)₅Al(Si₃Al)O₁₀(OH)₈

2.6 - 3.4

2 - 2.5

Pyrite

FeS₂

4.9 - 5.0

Paramagnetic

6 - 6.5

Sphalerite

ZnS

3.9 - 4.2

Diamagnetic

3.5 - 4

Cancrinite

Na₆Ca₂Al₆Si₆O₂₄(CO₃)₂

2.5

Microcline

KAlSi₃O₈

2.6

Nepheline

(Na, K)AlSiO₄

2.7

Sodalite

Na₈(Al₆Si₆O₂₄)Cl₂

2.2