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. Another unique variety of tourmaline that is also highly valued is chrome tourmaline, a rare type of dravite tourmaline from Tanzania which occurs in a very rich green color caused by chromium, the same element which causes the green in emerald. This crystal has a lovely green color and amazing banding of holmquistite as well as an etched termination to die for.
Namalulu Tourmaline 177.87 CTS.
$1,500.00 Regular Price
- 177.87 cts 43 x 21 x 20 mm