Alien amethyst (aka red cap amethyst, aka hematite-included amethyst) is amethyst with iron oxide that formed on top of it. 
These pieces are polished to a lovely shine. 
 
Piece A ($25) is approximately 3 inches along its longest dimension and is 162.9g. 
 
Piece B ($17) is approximately 2.5 inches along its longest dimension and is 100.9 g. 
 
Piece C ($12) is approximately 3.25 inches along its longest dimension and is 48.0 g.
 
Piece D ($9) is approximately 1.5 inches along its longest dimension and is 38.5 g.
 
Piece E ($9) is approximately 1.75 inches along its longest dimension and is 35.2 g.
 
Piece F ($11) is approximately 2.5 inches along its longest dimension and is 50.2 g.
 
Piece G ($8) is approximately 1.75 inches along its longest dimension and is 26.4 g.
 
The color on your screen may not be the exact color of the stones. This is a natural product, and each piece is unique and has flaws, which contribute to the beauity and individuality of the crystal.
These crystals were ethically sourced from Brazil