from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A dark form of sphalerite that is rich in iron
from the GNU version of the Collaborative International Dictionary of English
- n. A ferruginous variety of shalerite or zinc blende, nearly black in color.
from The Century Dictionary and Cyclopedia
- n. A variety of sphalerite or zinc sulphid, containing considerable iron, and hence of a black color. The original, found at Marmato, near Popayan, in Colombia, contained 23 per cent. of sulphate of iron.
Sorry, no etymologies found.
In addition, some more innovative research was carried out on bacterially leaching marmatite (zinc) concentrates from Colquiri.
Although the results were positive the technology has still not been developed, nor has mine management been informed of its potential as an alternative for recuperating marmatite from flotation tailings. 15 There has been a considerable diffusion of technology and related ideas to other mine sites and firms stimulated by turnovers of personnel during the Copper Project and the employment in other companies and institutions throughout the Andean Region.