Magadiite
A variety of Minerals
What is Magadiite?
Magadiite is a hydrous sodium silicate mineral (NaSi7O13(OH)3·4(H2O)) which precipitates from alkali brines as an evaporite phase. It forms as soft (Mohs hardness of 2) white powdery monoclinic crystal masses. The mineral is unstable and decomposes during diagenesis leaving a distinctive variety of chert (Magadi-type chert). The mineral was first described by Hans P. Eugster in 1967 for an occurrence in Lake Magadi, Kenya, and is also found at Olduvai Gorge, Tanzania. It is also reported from alkalic intrusive syenites as in Mont Saint-Hilaire, Canada.
Magadiite Market Value Calculator
Estimate the market value of Magadiite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Magadiite Localities Map
See where Magadiite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Hardness (Mohs)
- 2
Chemical Properties
- Chemical Formula
- Na2Si14O29 · 11H2O
- Elements
- H, Na, O, Si
Identify Magadiite Instantly
- Snap a photo, get instant results
- 6,700+ rocks, minerals & crystals
- Discover collecting spots near you
%252FAbenakiite-(ce)-01.jpg&size=small)
