Sea Glass
What is Sea Glass?
Sea glass is formed when glass fragments, typically from broken bottles, jars, or other glass objects, are tumbled and smoothed by the action of the ocean. Over time, the glass is eroded by the sand, water, and other elements, resulting in a frosted appearance and rounded edges. The color of sea glass depends on the original source of the glass, with common colors including green, brown, white, blue, and less frequently, red, orange, and purple. The value of sea glass is often determined by its color, rarity, and condition, with rare colors and well-preserved pieces being the most sought after.
Optical Properties
- Pleochroism
- None
Discover Values
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Sea Glass before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Sea Glass Localities Map
See where Sea Glass is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
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Quick Facts
Physical Properties
- Color
- Various, including green, brown, white, blue, red, orange, and purple
- Hardness (Mohs)
- 5.5-7
- Density
- 2.4-2.6 g/cm³
Chemical Properties
- Chemical Formula
- SiO2 (with varying amounts of other oxides)
- Elements
- Si, O, Na, Ca, Mg, Al, Fe
Also Known As
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Sea Glass FAQs
How do I identify Sea Glass?
Sea Glass can be identified by its hardness of 5.5-7 on the Mohs scale, Various color. Look for these key characteristics when examining specimens.
What color is Sea Glass?
Sea Glass typically appears in Various, including green, brown, white, blue, red, orange, and purple. Color can vary depending on impurities and formation conditions.
How hard is Sea Glass?
Sea Glass has a hardness of 5.5-7 on the Mohs scale. This gives it moderate hardness.