Pikes Peak Pebble Pups

Pikes Peak Pebble Pups

Monday, January 26, 2015

Guide to Minerals: Amazonite

By Steven Marquez

Notes: This specimen is a variety of microcline feldspar. Many jewelers love this mineral for making cabochons because the brilliant color of. The blue color is thought to be caused by traces of lead and water. This gemstone is called the “Stone of Hope” because it inspires confidence and hope. The name “Amazonite” comes from the Amazon River in South America. Amazonite can be found at the Lake George area along with smoky quartz. The occurrence of amazonite is very limited.

This amazonite crystal group was found near Lake George, Colorado. A S. Veatch
specimen. Photo by Steven Marquez.

Chemical formulaKAlSi3O8
Composition: potassium aluminum silicate
Color: bluish green or verdigris green
Crystals: triclinic
Cleavage: good, two directions at 90 degrees
Fracture: uneven
Luster: vitreous
Streak: white
Hardness: 6
Transparency: none
Specific gravity: 2.56-2.57

An Amazonite Haiku:
Microcline feldspar.
Bluish or verdigris green.
The perfect jewelry

About the author:
Steven Marquez is an Earth Science Scholar with the Pikes Peak Pebble Pups and is a member of the Colorado Springs Mineralogical Society. He is a frequent contributor to magazines and newspapers. He is in the 8th grade and lives in Colorado Springs.


Chesterman, Charles W. The Audubon Society Field Guide to North American Rocks and Minerals.              New York : Alfred A. Knopf, 1990.

Hall, Cathy. Smithsonian Handbooks: Gemstones. New York : Dorling-Kindersley, 2002.

Welcome! This is the gateway to adventure and discovery

Through this blog pebble pups and junior members of the Colorado Springs Mineralogical Society can access their lessons, work on assignments and projects, and receive details about field trips in the Pikes Peak Region. This Internet program is also suitable for young people who are interested in Earth science but do not live near a rock club or gem and mineral society or for young people anywhere who want a deeper dive into these topics. The only requirement is that all participants must be members of the Colorado Springs Mineralogical Society and must fill out the CSMS membership form (under important websites) and send their registration and membership fee in. Steven Veatch is the senior instructor and will need an email from you with your name, address, phone number, and permission from your parents to participate in this program.