Chrysoberyl (var: Alexandrite) (color-changing twin)Alexandrite is one of the most well known color changing minerals varieties of species extant. As a matter of fact, when we refer to other color changing minerals varieties, the term "Alexandrite Type" effect is often used to describe the color change. Alexandrite is not actually a species, but rather the color changing variety of Chrysoberyl, first discovered in Russia in the 1830 was and named after Tsar Alexander II. Even though the material has

Even if you find one thick enough to cut

electric royal-blue

as is often the case with Citrine from Brazil

Andorite is lead

antimony sulfosalt Franckeite consisting of somewhat "sword"-shaped crystals oriented into spherical aggregates which are sitting on matrix

An impressive Wavellite for the locality

pinkish-purple

The crystals show a slight blue hue in areas when rotated in the light

the most significant sulfide in the mine is Tetrahedrite

in the Pisco Province of the Ica Department of Peru

and certainly worth picking up if you are a collector of San Juan minerals

Spinel is a must have species