Gold Facts and Identification
Gold, symbolized by Au, has a specific gravity (SG) of 19.3, making it much denser than many minerals like pyrite (SG 4.9-5.2) and mica (SG 2.7-3.4). This high density is crucial for identifying gold and using extraction methods like panning and dry blowing, where gold sinks quickly due to its weight.
Key Identification Points:
- Streak Test: Gold leaves a yellow streak; pyrite leaves a greenish-black streak, and mica leaves none.
- Malleability: Gold flattens when hammered, unlike pyrite and mica, which shatter.
- Hardness: Gold ranks 2.5-3 on Mohs scale, softer than quartz (7) and pyrite (6-6.5).
Field Identification Tips: Gold is easily recognized once found, but small pieces can be tricky. Use these methods to identify gold:
- Test all metal detector hits, especially in areas with ironstone or gravel, as gold may be encased.
- Break open rocks or crush and pan them to check for hidden gold.
By understanding these characteristics, you'll have more confidence in identifying real gold during your prospecting adventures.
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