Visual Properties:
* Color: While not always reliable, color can be a helpful starting point. Note: some minerals can come in a wide range of colors.
* Streak: The color of a mineral's powder, obtained by rubbing it against a streak plate. Can be more consistent than color.
* Luster: How light reflects off the mineral's surface. Examples include metallic, glassy, pearly, dull, etc.
* Crystal Form/Habit: The external shape of the mineral, if it has one. Examples include cubic, hexagonal, prismatic, etc.
* Cleavage and Fracture: How a mineral breaks. Cleavage forms flat, smooth surfaces, while fracture is irregular.
Other Properties:
* Hardness: A mineral's resistance to scratching. Measured using Mohs Hardness Scale (1-10).
* Specific Gravity: The ratio of the mineral's density to the density of water. A heavy mineral for its size will have a higher specific gravity.
* Magnetism: Some minerals are attracted to magnets.
* Fluorescence: Some minerals glow under UV light.
* Taste: Some minerals have a distinctive taste (e.g., halite). *Warning: Do not taste minerals unless specifically instructed by a qualified expert!*
* Smell: Some minerals have a distinctive smell when rubbed or scratched (e.g., sulfur).
Important Note:
No single physical property is enough to definitively identify a mineral. You usually need to combine several properties to narrow down the possibilities.
Additional Resources:
* Field guides: Many excellent field guides are available to help you identify minerals.
* Online databases: Websites like mindat.org provide information on mineral properties and identification.
* Mineral Identification Kits: These kits often contain a streak plate, a hardness scale, and a magnifying glass.
Remember, always use caution when working with minerals and consult with a qualified expert if you are unsure about the identification of a particular specimen.
