mineral-based human-made alloy
Stainless Steel Spoon
Iron-Chromium Alloy (Fe + Cr + Ni)
Hardness: 5.5-6.5 (Mohs scale), Color: silver-grey, Luster: metallic, Crystal structure: face-centered cubic/body-centered cubic, Non-porous
- Hardness
- 5
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Physical properties
Hardness: 5.5-6.5 (Mohs scale), Color: silver-grey, Luster: metallic, Crystal structure: face-centered cubic/body-centered cubic, Non-porous
Formation & geological history
Manufactured through the smelting and alloying of iron ore, chromite, and nickel. These minerals were formed in the Earth's crust billions of years ago through magmatic processes.
Uses & applications
Kitchenware, cutlery, and culinary tools due to its corrosion resistance and durability.
Geological facts
Stainless steel was first discovered in 1913 by Harry Brearley. It contains at least 10.5% chromium which forms a protective oxide layer that prevents rusting.
Field identification & locations
Identified by its distinctive reflective metallic surface and standard utensil shape. Found in household environments rather than natural geological outcrops.
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Metal Alloy (Likely Pewter or Sterling Silver)
Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).
Man-made material (metal)
Concrete rubble
Anthropogenic conglomerate
sedimentary
Engineered Quartz Stone
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mineral-based composite
One Pound Coin (UK)
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mineral