How to identify Kunzite

To correctly identify Kunzite (Spodumene (variety Kunzite)), 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

   Pink to lilac, sometimes violet-pink. Can be colorless, yellow, or green (Hiddenite) in other spodumene varieties. The color is often unevenly distributed.

2. 2

   Luster

   How the surface reflects light: metallic, vitreous, dull

   Vitreous (glassy) to pearly on cleavage surfaces.

3. 3

   Texture

   Grain size and surface feel: coarse, fine, glassy

   Smooth, glassy feel on crystal faces; splintery or uneven on fracture surfaces.

4. 4

   Crystal Form

   Shape of visible crystals or crystal faces

   Typically occurs as prismatic crystals, often flattened and striated parallel to the c-axis. Crystals can be very large and well-formed.

5. 5

   Cleavage

   How it breaks: flat cleavage planes vs irregular fracture

   Perfect cleavage in two directions at nearly 90 degrees (87 and 93 degrees), and a distinct parting parallel to {100}.

6. 6

   Geological Environment

   The rock formation and setting where it occurs

   Exclusively found in lithium-rich granitic pegmatites, often associated with other pegmatite minerals such as quartz, feldspar, mica, tourmaline, beryl, and other lithium minerals like lepidolite.

Key Facts

Hardness

6.5-7 on the Mohs scale

Specific Gravity

3.16-3.20 g/cm³

Crystal System

Monoclinic

Color

Pink, lilac, violet-pink (due to Mn3+)

Luster

Vitreous to pearly

Transparency

Transparent to translucent

Fracture

Uneven to splintery

Cleavage

Perfect on {110} and {110} (two directions at nearly 90 degrees), with distinct parting on {100}

Composition

Lithium aluminum inosilicate (LiAlSi2O6)

Physical characteristics

• Crystal Habit: Prismatic, often flattened and striated parallel to the c-axis; also massive.
• Cleavage Type: Perfect in two directions (prismatic) at approximately 87° and 93°, and distinct parting parallel to {100}.
• Fracture Type: Uneven to splintery.
• Tenacity: Brittle.
• Luster Type: Vitreous (glassy) to pearly on cleavage surfaces.

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