- MD-121701
- Tapiolite
- Baixao da Laje mine, Parelhas, Borborema mineral province, Rio Grande do Norte, Northeast Region, Brazil
- Thumbnail, 1.4 x 1.3 x 0.7 cm
- SOLD
Tapiolite is actually a group name for the Ferrotapiolite-Manganotapiolite series. Iron and manganese can substitute for one another, and also the rare elements tantalum and niobium - two elements you almost never see in mineral specimens. Good crystals such as this are very rare! And this one is lustrous, sharp and complete, with shiny faces and only one contact on the underside. Ex. Carl Davis Coll., old piece.