description Contra Luz Opal Overview
Contra luz opal is a distinct variety of opal known for exhibiting play-of-color only when light is transmitted through the stone from behind, rather than reflecting off its surface. This optical effect makes the internal colors visible primarily when the gemstone is held up against a direct light source. Contra luz opals are predominantly sourced from regions such as Mexico and Ethiopia, and they are primarily sought by specialized gem collectors and mineralogists.
help Contra Luz Opal FAQ
What is a contra luz opal?
Contra luz opal is a unique variety of opal that exhibits its play-of-color only when light is transmitted through the stone from behind. This means the internal colors are most visible when the gemstone is held up directly against a light source.
How does contra luz opal look in normal lighting?
In standard reflected lighting, a contra luz opal often appears relatively clear, glassy, or slightly murky with a muted body color. The vibrant flashes of color remain mostly hidden until light passes directly through the gem.
Where are contra luz opals typically found?
This optical phenomenon is most famously associated with opals mined in Mexico. Mexican opal deposits frequently yield transparent to translucent stones capable of this specific light-transmitted play-of-color.
Are contra luz opals valuable?
High-quality contra luz opals are highly prized by collectors due to their unique optical properties and relative rarity. Their value heavily depends on the intensity, variety, and visibility of the colors seen when the stone is backlit.
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