Menkar- MENKAR (Alpha Ceti). Cetus, the Sea Monster (or Whale), appears to move backwards across the sky, his tail (illuminated by Deneb Kaitos) rising first, Menkar, at the leading (eastern) edge of his head, rising last.
- Fluorite (Wikipedia)
Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF2. It belongs to the halide minerals. It crystallizes in isometric cubic habit, although octahedral and more complex isometric forms are not uncommon.