Iridescent Aragonite
Aragonite
What is Iridescent Aragonite?
Iridescent Aragonite is a variety of the mineral aragonite that exhibits a play of color, similar to that seen in opals or mother-of-pearl. This iridescence is caused by the interference of light within thin layers or films of impurities or structural variations within the aragonite crystal structure. The effect can produce a shimmering, rainbow-like display of colors across the surface of the stone. The stone is often found in botryoidal (grape-like) formations or as stalactitic growths.
Optical Properties
- Refractive Index
- 1.530 - 1.686
- Birefringence
- 0.154
- Pleochroism
- None
- Optical Character
- Biaxial positive
- Dispersion
- 0.018
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Quick Facts
Physical Properties
- Color
- White, yellow, green, blue, brown, with iridescent play of color
- Hardness (Mohs)
- 3.5 - 4
- Density
- 2.93 - 2.95 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- CaCO3
- Elements
- Calcium, Carbon, Oxygen
Also Known As
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