amazonstone

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Figure 5: Minerals displaying good crystal form. Although such occurrences are in the minority, they receive considerable attention because of their beauty and because they reflect the symmetry content inherent in the external form and in the internal structure of the mineral. (From top) wulfenite, PbMoO4, from Mexico; rose quartz from Minas Gerais state, Brazil; microcline feldspar, KAlSi3O8, the greenish blue variety known as amazonite, with smoky (dark gray) quartz, from Colorado, U.S.

A sample of amazonite, a greenish blue variety of microcline feldspar, with smoky (dark gray) quartz. Microcline feldspar is an example of a mineral that displays good crystal form.

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solar eclipse, sun, moon, astronomy, space

How Do You Tell the Difference Between Total, Annular, Solar, and Lunar Eclipses?

Arrangement of the phases of the moon in total eclipse with Blood Moon

9 Celestial Omens

Solar system illustration. (planets; sun)

Why Are Planets Round?

Galaxy clusters like Abell 2744 can act as a natural cosmic lens, magnifying light from more distant, background objects through gravity. NASA's James Webb Space Telescope may be able to detect light from the first stars in the universe if they are gravitationally lensed by such clusters. (astronomy, space exploration, galaxies)

How Fast Is the Universe Expanding?

Astronomical Observatory of the Mojon del Trigo. Long exposure using the star trail technique. Sierra Nevada National Park, in the province of Granada, Andalusia.

Is Earth Going to Change the Direction in Which It Rotates?

Discover

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

Stylish light blue jeans on wooden background, closeup of inset pocket

Why Do Jeans Have That Tiny Pocket?

Orange basketball on black background and with low key lighting. Homepage 2010, arts and entertainment, history and society

The 10 Greatest Basketball Players of All Time

World Data Locator Map: Australia

Is Australia an Island?

Town of Sisimiut located on the coast of the Davis Strait on Kangerluarsunnguaq Bay, Greenland

The Largest Islands in the World

The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.

What If the President Is Impeached?

Four year old boy with grandfather and father lighting Hanukkah menorah. Photo taken on: December 21st, 2009

Which Is Correct: Hanukkah or Chanukah?

amazonstone: Facts & Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Facts

Also Known As	amazonite

Photos

Figure 5: Minerals displaying good crystal form. Although such occurrences are in the minority, they receive considerable attention because of their beauty and because they reflect the symmetry content inherent in the external form and in the internal structure of the mineral. (From top) wulfenite, PbMoO4, from Mexico; rose quartz from Minas Gerais state, Brazil; microcline feldspar, KAlSi3O8, the greenish blue variety known as amazonite, with smoky (dark gray) quartz, from Colorado, U.S.

A sample of amazonite, a greenish blue variety of microcline feldspar, with smoky (dark gray) quartz. Microcline feldspar is an example of a mineral that displays good crystal form.

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Topics

gemstone microcline garnet jade opal topaz turquoise jasper jadeite zircon amethyst kyanite

Quiz

Basalt sample returned by Apollo 15, from near a long sinous lunar valley called Hadley Rille. Measured at 3.3 years old.

(Bed) Rocks and (Flint) Stones