This large chunk of Amazonite, 2-3 inches in diameter, is great for any mineral collection.

FOUND IN: BRAZIL, MADAGASCAR & COLORADO USA

This semi-opaque blue-green variety of feldspar is named after the Amazon River. Its bright green color comes from small quantities of lead and water in the feldspar. When polished, Amazonite is sometimes cut and used as a gemstone, although it is easily fractured.

Amazonite Specifications:

• Color: Green, blue-green
• Color of streak: White
• Moh’s hardness: 6-6½
• Specific gravity: 2.56-2.58
• Cleavage: Perfect
• Fracture: Uneven
• Crystal system: Triclinic; prismatic
• Chemical composition: K(AISi3O8) potassium aluminum silicate
• Transparency: OPaque
• Refractive index: 1.522-1.530
• Double refraction: -0.008
• Dispersion: 0.012
• Pleochroism: None
• Absorption spectrum: Not usable
• Fluorescence: Weak, olive green