Opal, approx. 5 × 4 mm, from Ethiopia – 1 piece
This Opal from Ethiopia measures approx. 5 × 4 mm and has a tapered, pointed shape. It shows a lively play of color with changing green, yellow, orange, and occasionally bluish tones. The polished surface enhances the typical opalescence, allowing light to move across the stone in dynamic reflections. This characteristic color play varies depending on the viewing angle and lighting conditions, giving the Opal its distinctive appearance. The slightly pointed form makes the stone especially interesting for individual jewelry designs.
Geology & origin
Opal is an amorphous, hydrated silica and is classified as a mineraloid due to its lack of crystalline structure. Its characteristic play of color is caused by the diffraction of light within a fine internal structure of silica spheres. Ethiopian Opals typically form in volcanic rocks and are often hydrophane, meaning they can absorb water and temporarily change their appearance. The deposits in northern Ethiopia, particularly in the Wollo region, are among the most important modern sources of Opal with strong color play.
Application note
The stone is suitable, among other things, for jewelry making such as rings, pendants, or earrings, as well as for gemstone collections. Due to its material properties, Opal should be protected from strong temperature changes, drying out, and mechanical impact. For cleaning, lukewarm water and a soft cloth are recommended.