12.3" Polished Green Magneprase Slab - Western Australia

Polished Green Magneprase Slab - Western Australia #239989

This is a 12.3" wide, polished slab of magneprase, collected from a location south of Kalgoorlie in the Eastern Goldfields of Western Australia. It gained the name "magneprase" from its composition which includes magnesite (white), prase chalcedony, and chromium chalcedony. The presence of chromium gives it the unique green hues.

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.

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