How to distinguish amethyst from fluorite?

The jewel difference between them is: 1. Observed with a dichroic mirror, amethyst has dichroism, while violet fluorite has no dichroism. Dichroic mirrors can be seen everywhere where you buy crystals. 2. Crystal amethyst: hexagonal column, triangular bipyramid, condensed, with horizontal stripes and twins on the support, and its crystal face is kept in a round bead shape by water drops. Purple fluorite is an irregular crystal, usually cubic, octahedral, rhombic dodecahedron and aggregate, or it can be a strip-shaped dense block aggregate. 3. Cleavage amethyst: There is no cleavage, but there is an obvious cleavage line inside the fluorite. 4. Amethyst features of inclusions: irregular inclusions and cotton wadding bubbles with poor quality are irregular. However, purple fluorite basically has no inclusions, and there are only some cleavage lines inside, which is very pure.