Opal Rough- 3.8 g - (1)

19.00 ct 26.00 x 20.00 x 8.00 mm Finest Rainbow Welo rough opal (natural opal)
2.60 cm larger XL Opal!
3.80 grams - with fiery red, blue, and green sparkle - please view this opal under magnification with strong illumination - it is full of fiery red and sparkling green and intensely metallic blue light reflections - please note: the play of color is only strongly visible under bright lighting or direct sunlight!
This auction features this impressive natural rough opal from the world-famous Welo opal mines in Ethiopia. This piece impresses with its immense size of 2.60 cm and 19.00 carats, as well as a lively, multicolored fire that is typical for high-quality Welo opals.
The opal displays an intense play-of-color with bright green, yellow, orange, and red flashes that sweep through the material in a banded and expansive way. Especially under direct sunlight or bright LED light, the stone reveals its full visual presence and unveils a dynamic, constantly changing color play.
In diffused light the fire remains visible, but naturally appears much calmer and softer—a typical and appreciated behavior of untreated Welo opals.
The semitransparent to transparent base matrix gives the opal depth and ensures that the play of color does not merely appear superficial, but seems to glow from within the stone. The natural, rough form makes this specimen particularly interesting for both collectors and lapidaries, as several cutting orientations are conceivable.
Welo-Opals are known for their hydrophobic properties and, due to their range of colors, purity, and relatively young discovery history, are among the most sought-after opals on the international gemstone market.
Gemmological data
Gem: Natural Opal (Welo Opal)
Origin: Ethiopia, Welo region
Weight: 19.00 ct (approx. 3.80 g)
Dimensions: approx. 26 × 20 × 8 mm
Treatment: None – 100% natural / untreated
Transparency: semi-transparent to transparent
Classification
This piece is particularly suitable as
a high-quality collectible (Specimen) or as an excellent cutter’s piece for further processing into a unique gemstone with strong color play.
The hydrophane, water-containing opal shows an intense, three-dimensional spectrum of red, green, blue and gold — rarely seen in this saturation and size.
Natural silica gel structures in the stone refract the light in the finest microarchitecture – a mineralogical miracle.
At 19 ct, this is an impressive investment and collector's stone.
Untreated or set in platinum: a symbol of style, rarity and substance.
Invest in geological excellence with lasting value.
The stone comes from the Semien Wollo mountain region and is therefore called Welo Opal.
Specific location: Wegel Tena (The stone has been checked for authenticity by us)