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3.9" Pink Poldervaartite/Olmiite On Matrix - South Africa
This is an aggregation of Poldervaartite and Olmiite crystals on a Manganese rich matrix. In natural light, the crystals display a pinkish-brown color, while presenting a pinkish-salmon color under artificial light. Small Calcite crystals can also be seen surrounding the Olmiite and Poldervaartite crystals.
About Poldervaartite
Poldervaartite is a calcium and manganese-based mineral, which features Ca as the dominant molecule. This is notable from its chemical formula, (Ca2,Mn)[SiO3(OH)](OH). This is very similar to olmiite, a manganese-dominant mineral with the chemical formula CaMn[SiO3(OH)](OH). Both are found in association with each other in a few known locations in South Africa, most commonly throughout the Kalahari Manganese Fields.
Poldervaartite tends to exhibit a peach color enshrouded in a transparent mineral sheath, while olmiite typically displays a deeper salmon color with little to no transparency, though this is all dependent on the environment and impurities present during formation.
Poldervaartite is a calcium and manganese-based mineral, which features Ca as the dominant molecule. This is notable from its chemical formula, (Ca2,Mn)[SiO3(OH)](OH). This is very similar to olmiite, a manganese-dominant mineral with the chemical formula CaMn[SiO3(OH)](OH). Both are found in association with each other in a few known locations in South Africa, most commonly throughout the Kalahari Manganese Fields.
Poldervaartite tends to exhibit a peach color enshrouded in a transparent mineral sheath, while olmiite typically displays a deeper salmon color with little to no transparency, though this is all dependent on the environment and impurities present during formation.
SPECIES
Poldervaartite/Olmiite
LOCATION
Kalahari Manganese Field, South Africa
SIZE
3.9x2.8", Largest Crystal .58"
CATEGORY
ITEM
#37752
