28 Ct Untreated Raw Ethiopian Fire Opal | Natural Rough Welo Opal Stone with Green & Orange Fire | 24x20x14 MM

Untreated Raw Ethiopian Fire Opal — with Vivid Green & Orange Fire

This is nature's artistry at its most unfiltered. Weighing 28 carats and measuring 24×20×14 MM, this untreated raw Ethiopian fire opal is a live showcase of the geological phenomenon that makes Welo opal the most exciting rough gemstone in the world today. Vivid green fire dominates the face of this stone, punctuated by bursts of orange, flashes of blue, and traces of red — all shifting and dancing with every movement of light across its semi-transparent surface.

What makes this raw opal stone particularly striking is its organic, irregular shape — entirely uncut and unaltered, exactly as it emerged from the volcanic rock formations of the Welo region, Ethiopia. The rough surface and natural sandy matrix give this stone a raw, geological authenticity that polished cabochons simply cannot replicate. This is opal in the raw — carrying the story of millions of years of formation without a single alteration by human hands.

100% untreated, 100% natural, 100% Welo origin — authenticated and exactly as shown.

The Story Inside This Raw Opal

Every raw Ethiopian opal is a geological record. This stone was formed when silica-rich water seeped through volcanic rock in the Ethiopian highlands over millions of years, slowly depositing microscopic spheres of silicon dioxide in organized grids. When light hits these grids, it diffracts into its component colors — creating the green, orange, blue, and red opal raw crystal inside fire you see.

The green dominant flash in this stone comes from medium-sized silica spheres that diffract green wavelengths most strongly. The orange bursts are produced by larger spheres, the blue flashes by smaller ones — all coexisting within the same stone, creating the multicolor broadflash that collectors prize most. The irregular rough shape means the fire plays differently from every angle, revealing new color combinations with each shift of light.

This is the living fire that makes raw opal unlike any other mineral on Earth.

Untreated Raw Opal — Why It Matters

Most raw opal for sale in the market has been treated in some way — smoke treatment to darken the body tone, resin filling to improve clarity, or oil treatment to temporarily enhance color. This stone has received zero treatment of any kind.

What you see is precisely what nature created:

• ✔ 28 carats — large format raw opal, impressive weight with strong multicolor fire
• ✔ Green & orange dominant fire — most vivid and saturated color combination visible from every angle
• ✔ Heavy natural matrix — authentic Welo volcanic sandstone host rock attached to the surface
• ✔ Organic irregular shape — uncut, unshaped, entirely natural rough form
• ✔ Semi-transparent body — light penetrates and illuminates the fire from within
• ✔ 100% untreated — no smoke, no resin, no oil, no enhancement of any kind
• ✔ Welo region origin — Ethiopia's finest opal-producing area

Who Buys Raw Ethiopian Fire Opal?

Raw Ethiopian opal has gained remarkable popularity among several distinct buyer groups — all drawn to the stone for different but equally compelling reasons:

Collectors seeking rare, premium rough specimens for display. A raw opal rock of this size and color quality is a genuine collector's piece — the kind of stone that anchors a mineral collection and draws admiration from anyone who sees it.

Jewelry designers and lapidaries who want to work with the stone directly — cutting, shaping, and polishing it into a custom cabochon for a bespoke raw opal ring, pendant, or earring. The stone's size and color potential make it an extraordinary starting point for a one-of-a-kind jewelry piece.

Crystal enthusiasts drawn to natural, earth-formed stones for their energy and authenticity. Raw Ethiopian fire opal carries the element of fire and water, resonating with creativity, passion, intuition, and emotional vitality.

Gift buyers looking for something completely unlike anything available in regular jewelry stores. As the October birthstone, raw Ethiopian opal is a deeply meaningful and memorable gift for anyone born in October — or for anyone who simply appreciates the rare beauty of the natural world.

How to Identify Raw Opal — Is This Stone Genuine?

How to identify raw opal authenticity is the most important question for any buyer. Here is what confirms this stone is genuine:

Fire shifts with every angle. Genuine raw opal has play of color that moves, shifts, and changes as the stone is tilted. Imitation opal has static, uniform color. The green and orange fire in this stone changes character completely from different viewing angles — a definitive sign of genuine natural opal.

Natural matrix is attached. The sandy, rough matrix (volcanic sandstone) attached to the surface of this stone is natural Welo formation rock — not added or artificially applied. Its irregular, non-uniform attachment is a reliable indicator of authentic unpolished raw opal.

Semi-transparent body with natural optical character. Genuine raw opal rock has a slightly hazy, translucent body — not glass-clear like synthetic opal. The semi-transparency here is entirely natural.

Organic, irregular shape. Real raw opals in uncut form are never perfectly shaped or symmetrical. This stone's organic, irregular edges confirm it has not been shaped or altered.

October Birthstone — A Meaningful Gift

This raw Ethiopian fire opal is the traditional October birthstone — one of the most visually spectacular birthstone options available. Unlike a standard polished opal pendant, gifting a genuine raw opal specimen means gifting something truly rare — a piece of the earth that has never been altered, shaped, or enhanced by human hands.

For October birthdays, anniversaries, or any occasion where the gift should be genuinely extraordinary and unlike anything else, this raw opal for sale delivers exactly that.