How to identify Unidentified Mineral/Rock
Unidentified
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Open the appTo correctly identify Unidentified Mineral/Rock (Unidentified), 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
Color
Overall color and any zoning or banding
Observe the primary color and any secondary hues or color variations.
- 2
Luster
How the surface reflects light: metallic, vitreous, dull
Note how light reflects off the surface (e.g., metallic, vitreous, dull, earthy, greasy, silky, pearly).
- 3
Texture
Grain size and surface feel: coarse, fine, glassy
Describe the feel and appearance of the surface (e.g., rough, smooth, granular, crystalline, glassy).
- 4
Crystal Form
Shape of visible crystals or crystal faces
Look for any discernible crystal shapes or habits (e.g., prismatic, tabular, massive, botryoidal, acicular).
- 5
Cleavage
How it breaks: flat cleavage planes vs irregular fracture
Examine if the specimen breaks along flat, parallel planes. If so, note the number of directions and quality (perfect, good, poor).
- 6
Geological Environment
The rock formation and setting where it occurs
Consider where the specimen was found. The geological context (e.g., igneous, sedimentary, metamorphic terrain, hydrothermal vein) can provide crucial clues.
Key Facts
- Hardness
- Unknown (requires testing)
- Specific Gravity
- Unknown (requires testing)
- Crystal System
- Unknown (requires observation)
- Color
- Unknown (requires observation)
- Luster
- Unknown (requires observation)
- Transparency
- Unknown (requires observation)
- Fracture
- Unknown (requires observation)
- Cleavage
- Unknown (requires observation)
- Composition
- Unknown (requires analysis)
Physical characteristics
- Crystal Habit: Unknown (requires observation)
- Cleavage Type: Unknown (requires observation)
- Fracture Type: Unknown (requires observation)
- Tenacity: Unknown (requires testing)
- Luster Type: Unknown (requires observation)
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