A purposefully-placed pile of broken rocks
A purposefully-placed pile of broken rocks
A plagioclase mineral and zeolite, Na2Ca4[Al10Si26O72].34H2O
An ore of antimony, Sb2S3
To break up ore by crushing and compaction
A cone shaped or cylindrical deposit of precipitated minerals that develops from a floor or low area upward
A cone shaped or cylindrical deposit of precipitated minerals that develops downward, or hangs from a roof or ceiling
The mineral characteristics which exhibits radial offshooting from the centre or a single point
An isometric gemstone mineral, MgAl2O4
The most common ore of zinc, zinc sulphide ZnS
An isometric platiniferous mineral, PtAs2