mineraloid
Dragon's Breath (Mexican Opal Glass)
Artisan Foil Glass (SiO2 based)
Hardness: 5-5.5 (Mohs scale), Color: Ruby red with blue or violet flashes, Luster: Vitreous, Crystal Structure: Amorphous (Glass), Specific Gravity: 2.4-2.5
- Hardness
- 5-5
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Physical properties
Hardness: 5-5.5 (Mohs scale), Color: Ruby red with blue or violet flashes, Luster: Vitreous, Crystal Structure: Amorphous (Glass), Specific Gravity: 2.4-2.5
Formation & geological history
Man-made glass created by mixing molten glass with metal foils to simulate the play-of-color in natural opals. First popularized in the early 20th century, specifically the 1920s-1950s.
Uses & applications
Primarily used in costume jewelry, lapidary art, and vintage-style pendants or brooches.
Geological facts
Despite being called Mexican Opal, it is not a stone at all, but a specialized glass. The blue 'lightning' flashes are created via an internal foil shimmer.
Field identification & locations
Identify by looking for a bright red base color and electric blue flashes that appear only at certain angles; unlike real opal, the pattern is very consistent and lacks a crystalline host rock.
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