marcasite in a sentence

Examples

1. This disintegration of marcasite in mineral collections is known as " pyrite decay ".
2. The sulfides galena, sphalerite and marcasite are enclosed within the quartz / baryte.
3. Uranium minerals are found associated with iron and manganese oxide, marcasite and pyrite.
4. The narrower, modern scientific definition for marcasite as orthorhombic iron sulfide dates from 1845.
5. Marcasite in the scientific sense is not used as a gem due to its brittleness.
6. It occurs as a weathering product under acidic conditions associated with pyrite or marcasite decomposition.
7. It occurs in hydrothermal deposits associated with sphalerite, pyrite, chalcopyrite, barite and marcasite.
8. The black shales also contain high amounts of sulfides ( marcasite, pyrite ) and carbon.
9. He bought marcasite stones, mainly in Czechoslovakia, that were used by Paris milliners at the time.
10. Associated minerals include melanterite, epsomite, jarosite, gypsum, sulfur, pyrite, marcasite and limonite.