Fluorite

Sample of cubic violet euhedral Fluorite with visible cleavage. Largest crystal size: 1.7 cm x 1.2 cm x 1.5 cm. Smallest crystal size: 0.3 cm x 0.4 cm x 0.3 cm. Fluorite (CaF2) can be violet, blue, green, yellow, brown, bluish black, pink, rose-red, white or colourless. Lustre is vitreous and streak is white. Hardness is 4 and cleavage is perfect in four directions forming an octahedron. Fluorite usually occurs as cubic or penetrations twins but can also be dodecahedral, cleavage masses, granular or columnar.