He [sc. Rochet d'Hericourt] mentions Débrabume, a village of Choa, as built upon a bluff of ‘zirconitic syenite, containing argentiferous gold’.
Transactions of American Institute of Mining Engineers 1882–3vol. 11 361
2006
The main contaminant minerals present in ZBC [= Zirconite B Concentrate] (0.03% of the zirconitic mass), are ilmenite, rutile, staurolite and monazite.
C. H. Sampaio et al., Characterization & Beneficiation Northeastern Brazilian Zircon 7/2 in researchgate.net (accessed 7 Oct.)