How to identify Lithium Quartz

To correctly identify Lithium Quartz (Quartz with Lithium inclusions), check each of these features in order. Many rocks and minerals look alike, so cross-reference multiple properties before deciding.

Step-by-step identification

1. 1

   Color

   Overall color and any zoning or banding

   Pale pink, lavender, purple, greyish-pink, often with a cloudy or hazy appearance due to inclusions. The color is typically unevenly distributed.

2. 2

   Luster

   How the surface reflects light: metallic, vitreous, dull

   Vitreous (glassy) on crystal faces and fracture surfaces.

3. 3

   Texture

   Grain size and surface feel: coarse, fine, glassy

   Can be massive or crystalline. Inclusions may give a slightly granular or fibrous appearance within the quartz.

4. 4

   Crystal Form

   Shape of visible crystals or crystal faces

   Typically forms hexagonal prisms terminated by rhombohedral faces, characteristic of quartz. Can also be found in massive or anhedral forms.

5. 5

   Cleavage

   How it breaks: flat cleavage planes vs irregular fracture

   None, characteristic of quartz. Exhibits conchoidal fracture.

6. 6

   Geological Environment

   The rock formation and setting where it occurs

   Granitic pegmatites, hydrothermal veins associated with granitic intrusions.

Key Facts

Hardness

7 (Mohs scale)

Specific Gravity

2.65 - 2.66

Crystal System

Trigonal

Color

Pale pink, lavender, purple, greyish-pink (due to inclusions)

Luster

Vitreous

Transparency

Translucent to opaque (due to inclusions)

Fracture

Conchoidal

Cleavage

None

Composition

SiO2 (Quartz) with inclusions of lithium-bearing minerals (e.g., lepidolite, cookeite, elbaite)

Physical characteristics

• Crystal Habit: Prismatic, massive, granular
• Cleavage Type: None
• Fracture Type: Conchoidal
• Tenacity: Brittle
• Luster Type: Vitreous

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