Product Details

1.20 cts Rare Fluorescent Mexican Hyalite Opal Pair Species: Opal (Hyalite variety) Chemical Formula: SiO₂·nH₂O Structure: Amorphous Color: Colorless to water-clear Transparency: Transparent to translucent Luster: Vitreous Habit: Botryoidal, globular, stalactitic coatings Optical Phenomenon: Intense green fluorescence under UV radiation due to trace Uranium content; high-grade material may exhibit daylight-reactive luminescence. Refractive Index: ~1.44–1.46 Specific Gravity: ~1.9–2.1 Hardness: 5.5–6 Locality: Primarily from Zacatecas, with additional occurrences in volcanic regions of Mexico Diagnostic Features: Absence of play-of-color Water-clear appearance with glass-like surface Strong UV प्रतिक्रिया (neon green fluorescence) Typical grape-like or droplet morphology Gemological Notes: Hyalite opal is a non-crystalline silica gel distinguished by its exceptional transparency and luminescent response. Unlike precious opal, it lacks ordered silica spheres and therefore does not display diffraction-based color play. Its value is driven by clarity, fluorescence intensity, and aesthetic formation.