Sardonyx Egg - 2in. - Intuitively selected Iron Phosphate 17kg block that maintains excellent

17kg block that maintains excellent structural integrity is rare

or neutral décor

Phosphosiderite’s lilac saturation is the result of a unique iron-phosphate molecular structure (FePO4 · 2H2O)

making it a meaningful piece for collectors

Color: Golden yellow

Sardonyx Egg - 2in. - Intuitively selected Iron Phosphate 17kg block that maintains excellentGeological Overview Sardonyx is a specialized variant of onyx, which itself is a banded variety of chalcedony (a cryptocrystalline form of silica, SiO2). Geologically, Sardonyx is defined by its alternating layers of sarda brownish red chalcedony coloured by iron oxideand parallel bands of white or black onyx. Forming within the trigonal crystal system, it typically precipitates from silica rich waters in the cavities of volcanic or sedimentary rocks.