Blue Amethyst with numerous Cave Druzy

Blue amethysts are specifically mined in Mexico as the heat in the country helps change the standard violet hue of the stone to a darker, more inviting blue.

A blue amethyst crystal is a stone, derived from regular amethyst, that is simply exhibiting itself in what are known as 'secondary hues'. The secondary hues to violet or purple are blue and red, so amethyst stone has the potential to appear in either of these colors depending on the conditions during formation.