Ethiopian Opal is a natural gemstone prized for its vivid play-of-color, where flashes of rainbow hues shimmer across a translucent to opaque body. Scientifically, it is a hydrated amorphous form of silica (SiO₂·nH₂O), with water content that contributes to its luminosity and, in some cases, its sensitivity to environment. Sourced primarily from Ethiopia, these opals are especially admired for their bright colors, organic glow, and expressive, almost living appearance.
- Color range: Milky white, crystal clear, honey, and light brown body tones with vibrant flashes of red, orange, green, blue, and violet
- Sizes: Commonly available from 5–8 mm for small stones; larger cabochons and freeform pieces often range from 10–25 mm or more, depending on cut and quality
- Shapes: Cabochons, freeform cuts, ovals, teardrops, rounds, and rough specimens
- Origin: Primarily Ethiopia, especially the Welo (Wollo) region
- Hardness: 5.5 to 6.5 on Mohs scale
- Luster: Soft to bright vitreous luster with a glowing, inner light
- Play-of-color: Distinctive flashing patterns that shift with movement and light, making each stone one-of-a-kind
- Transparency: Ranges from opaque to highly translucent or crystal-clear, depending on the specimen
