Galaxy Stone Bracelet
$30.00
Sale price
$30.00
Regular price
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In Michigan, the term "Galaxy Stone" is a popular rockhounding nickname for amygdaloidal basalt. This unique volcanic rock is primarily found along the shores of Lake Superior, especially in the Keweenaw Peninsula and Marquette areas.
Why it's called "Galaxy Stone"
The name comes from the stone's appearance when cut and polished. It typically has a dark gray to black host rock (basalt) filled with small, colorful mineral "bubbles" (amygdules) that resemble stars or swirling galaxies.
Key Characteristics
Host Rock: Usually a dense, dark basalt, but it can also be found in reddish-brown rhyolite.
The "Stars" (Inclusions): These are gas bubbles (vesicles) from ancient lava flows that were later filled with secondary minerals such as:
Native Copper: Gives the stone a metallic sparkle.
Quartz and Agate: Often white, clear, or banded.
Epidote and Chlorite: Provide green tones.
Prehnite or Feldspar: Can appear as pink or white spots.
Other "Galaxy" Rocks: Some collectors also use the term to describe Yooperlites (syenite rich in fluorescent sodalite) because their glow under UV light resembles a star field.
Galaxy Stone Bracelet
$30.00
Sale price
$30.00
Regular price