5.9" Polished Purple Dendritic Chalcedony Slab - Western Australia

This is an 5.9" wide, polished slab of purple dendritic chalcedony from near the town of Newman in the Pilbara Region of Western Australia. This variety of dendrite filled chalcedony forms as nodules in saprolite (chemically weathered/decomposed rock) clay that overlies a large serpentine outcrop. It typically ranges in color from purple to pale green.

Comes with an acrylic display stand.

Chalcedony is any microcrystalline variety of silica composed of very fine intergrowths of quartz and moganite. Microcrystalline meaning the crystals are microscopic and cannot be observed by the naked eye. Both quartz and moganite have the same chemical formula SiO2 (silicon dioxide) but different crystal structures. When free from impurities, chalcedony is colorless and transparent. Dependent on impurities present during formation, chalcedony can form in a wide variety of colors including red, yellow, green, blue, purple, grey, white and numerous color hues in between. Chalcedony is quite hard, being a 7 on the Mohs Hardness Scale, which makes sense considering quartz is the benchmark mineral for a 7.
Quartz var. Chalcedony
Near Newman, Pilbara Region, Western Australia
5.9 x 4.1", .4" thick