Sardonyx Egg - 2in. - Intuitively selected Iron Phosphate Blue Point is appreciated for

Blue Point is appreciated for qualities associated with calm communication

Color: Golden yellow

all-natural presentation

a microcrystalline form of quartz (SiO2) within the silicate mineral class

17kg block that maintains excellent structural integrity is rare

Sardonyx Egg - 2in. - Intuitively selected Iron Phosphate Blue Point is appreciated forGeological 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.