Opal; brown-beige; Indonesia; 100 g

Opal, brown-beige from Indonesia. 100 g

This 100 g lot consists of natural Opal pieces from Indonesia with varied coloration ranging from cream and beige to honey and brown. The pieces may show clearly defined color zones, cloudy transitions, and locally slightly translucent areas. Particularly characteristic is the contrast between lighter, milky-looking sections and stronger brown to caramel-colored areas, giving each piece its own individual pattern. A total of 100 g is supplied; the shape, size, and color distribution of the individual pieces may naturally vary.

Geology & Origin

Opal is a hydrated amorphous form of silica and differs from crystalline Quartz because it does not have a regular crystal structure. It forms when silica-rich solutions penetrate cavities, fractures, or porous areas within rocks and gradually solidify over time. Indonesia contains numerous volcanically influenced regions where silica-rich fluids can provide favorable conditions for Opal formation. The varying brown, beige, and yellow tones may be influenced by mineral impurities and iron-bearing compounds within the surrounding rock.