This amazing material comes from a recent find of Dravite from a Danburite mine near Namalulu, Tanzania that was mined just a few months ago. The tourmaline mineral group is chemically one of the most complicated groups of silicate minerals. It is a complex silicate of aluminum and boron, but because of isomorphous replacement (solid solution), its composition varies widely with sodium, calcium, iron, magnesium, lithium and other elements entering into the structure. Quite a lot of these new tourmalines have holmquistite inclusions which usually show up as fine white fibers or as bands before the drastic color change from brown to colorless in the crystals. The multitude of terminations above the band of holmquistite are colorless and quite chatoyant. This crystal is a bit darker in its lower sections than the rest but the amazing cap and many chatoyant terminations quite make up for that.
Namalulu Tourmaline 248.68 CTS.
$1,500.00 Regular Price
- 248.68 cts 41 x 25 x 25 mm