(n.) Arsenic sulphide, a mineral of a brilliant red color; red orpiment. It is also an artificial product.
Example Sentences:
(1) A mass survey and follow-up examinations to screen lung cancer victims at hunan realgar mine have been carried out over three years.
(2) Since 1984, mass screening for cancer has been carried out in the realgar and tin mines, high incidence areas of lung cancer.
Stibnite
Definition:
(n.) A mineral of a lead-gray color and brilliant metallic luster, occurring in prismatic crystals; sulphide of antimony; -- called also antimony glance, and gray antimony.
Example Sentences:
(1) Optimum pH, temperature and pulp density for microbiological leaching of museum-grade stibnite mineral has been investigated using a stibnite-adapted strain of Thiobacillus ferrooxidans.