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This Specimen has been sold.
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1.7" Pink Olmiite On Matrix - South Africa
This is an aggregation of Olmiite crystals on a Manganese rich matrix. In natural light, the crystals display a pinkish-brown color, while presenting a pinkish-red color under artificial light.
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 consist of a peach color enshrouded in a transparent mineral sheath, while olmiite typically exhibits a deeper salmon color, with little to no transparency depending on the specimen's manganese content. Olmiite also displays a deep red fluorescent color when placed under short-wave UV-light, whereas poldervaartite does not fluoresce.
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 consist of a peach color enshrouded in a transparent mineral sheath, while olmiite typically exhibits a deeper salmon color, with little to no transparency depending on the specimen's manganese content. Olmiite also displays a deep red fluorescent color when placed under short-wave UV-light, whereas poldervaartite does not fluoresce.
SPECIES
Poldervaartite/Olmiite
LOCATION
Kalahari Manganese Field, South Africa
SIZE
1.7x1.3", Largest Crystal .66"
CATEGORY
ITEM
#37741
