Mineraloid (Man-made origin)
Sea Glass
Amorphous Silica (Glass) SiO2
Hardness: 5.5-6; Color: Frosted blue-green (aqua); Luster: Vitreous to waxy/frosted; Structure: Amorphous; Cleavage: Conchoidal; Specific Gravity: 2.4-2.8
- Hardness
- 5
- Color
- Frosted blue-green (aqua)
- Luster
- Vitreous to waxy/frosted
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Physical properties
Hardness: 5.5-6; Color: Frosted blue-green (aqua); Luster: Vitreous to waxy/frosted; Structure: Amorphous; Cleavage: Conchoidal; Specific Gravity: 2.4-2.8
Formation & geological history
Formed from discarded glass products such as bottles or jars that have been tumbled by ocean waves and sand for 20 to 100 years, causing chemical weathering and physical erosion.
Uses & applications
Primarily used for jewelry, crafts, home decor, and as a popular item for beachcombers and collectors.
Geological facts
Genuine sea glass possesses a distinct 'frosted' surface caused by the leaching of soda and lime from the glass in salt water, often forming tiny 'C' shaped pit marks.
Field identification & locations
Identify by its frosted, non-shiny surface and rounded edges. Common on shorelines near historical dumping sites or high-traffic shipping lanes. Collectors value unique colors like red, orange, and turquoise.
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