mineral

Gold Flakes in Oil (Novelty Specimen)

Native Gold (Au)

Hardness: 2.5-3.0 on Mohs scale; Color: Metallic golden yellow; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None; Specific Gravity: 19.3 (very dense).

Hardness: 2
Color: Metallic golden yellow
Luster: Metallic

Identified March 14, 2026More mineral →

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Physical properties

Hardness: 2.5-3.0 on Mohs scale; Color: Metallic golden yellow; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None; Specific Gravity: 19.3 (very dense).

Formation & geological history

Primary gold typically forms in hydrothermal veins associated with quartz. These flakes are often secondary 'placer' gold eroded from veins. In this novelty item, industrial gold leaf is often used and suspended in mineral oil to magnify the appearance.

Uses & applications

Primary use is for investment, jewelry, and electronics. Small bottled specimens like this are sold as souvenirs, decor, or novelty gifts.

Geological facts

Gold is incredibly malleable; one ounce can be beaten into a sheet covering 100 square feet. Most 'gold leaf' used in these bottles is 22k-24k gold, but it is beaten so thin (0.1 microns) that the actual weight of the gold is negligible.

Field identification & locations

To identify in the field, look for 'sectility' (the ability to be cut with a knife without shattering) and high density. In these vials, the gold should sink slowly through the oil and maintain its color in any light. Found globally in areas like California (USA), Australia, and South Africa.

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